>If the above scientist shows me a farm that is a 100h size and makes a profit then we can talk.

The above farm is 20 times that size and switched over specifically because it is more profitable, that's the point. Maybe instead of insisting that reality isn't real you just watch the video? We're talking about real farms, not piddly hobbyist nonsense. If I were underestimating farmers, we wouldn't be having this discussion. But since most farmers are old, stuck in their ways and borderline illiterate, lots of them keep doing the same bad things that we've known are bad for over 70 years.

>Cucumber/tomato/potato/radish and are not native to Europe. Not only that but most of the vegetables you eat is heavily modified by selective breeding to increase yield.

None of those things are relevant at all. The genetic difference between crop species and their wild ancestors is tiny, and in fact most crop species out-compete their wild ancestors when sowed together.

>Weeds, on the other hand, are aggressive plants that optimize for survival.

All plants are optimized for survival. That's a meaningless statement. The question is survival WHERE? Wolves are optimized for survival, yet if you toss one in the middle of the ocean it doesn't actually survive. Corn is optimized for survival, but if you toss it in a barren dead patch of dirt, it struggles to grow. Corn evolved to form symbiotic relationships with fungi, which your tillage has exterminated. There are plants that evolved to grow in barren dead dirt. They do well there. You call them weeds, and pretend the ecosystem doesn't matter, weeds are just magically better no matter what. Yet if you have a healthy soil with plenty of undisturbed fungi, the corn out-competes the weeds.

Take the wild ancestor of any crop you are pretending can't compete and do a test with it. They compete fine in a healthy soil with a balanced microbiology, just like their modern crop varieties do. But if the rhizosphere is gone, the only plants that can grow well are those adapted to dead barren dirt, whose entire ecological niche is to colonize such areas and gradually restore them to healthy ecosystems. So on tilled dirt, they get out-competed by weeds just like the modern crop varieties do. Again, if you simply watched the video I linked before which you said you watched, you would already have had a microbiologist explain this for you with nice diagrams and everything. Ecological succession is real. The species which thrive in barren dirt are not the same as the species that thrive in old growth forests. Are pine trees not optimized for survival? Then why do they get out-competed by weeds if I plant them in tilled dead dirt? Have we modified them by selective breeding to increase yield? This is trivially easy to test for yourself if you don't believe scientists and their silly evidence.

>Weeds grow because you need have certain spacing between your crops. You either need to use chemicals or labour and tilling to ensure high yield.

No, you leave the residue and it blocks 95% of weed seed germination. If you haven't heard of mulch, you're not even attempting to be a farmer. You are just blindly going through the motions of what your great grandparents did.

>You will till to prepare for sowing.

No I do not.

>Even "no-till" farmers will till to some extent.

No we do not. The coulters on the planter simply open the soil for the seed to be deposited. Seriously, go look at a no-till planter before pretending they don't exist. You are thinking of strip tilling, which is a form of conservation tillage. No-till is not conservation tillage, it is no tillage.

>Because you are not a farmer

Yes I am. For someone who seems to have obtained all his knowledge of farming from farm simulator 2015, it seems silly to call the person pointing to scientists, farmers and university agricultural departments "not a farmer".

>Tilling is a very quick procedure that is not labour intensive

How do you think that driving equipment, literally the only labor done on a farm, is not labor? This isn't the 1800s, all farming involves is driving slowly for hours at a time, unless you have a self-driving tractor in which case it involves playing games on your phone. Tillage is literally the slowest and most fuel burning procedure in many primitive farming operations. Only for some crops is harvesting worse. But hey what do I know, I am totally not a farmer right? I bet people who study this for a living in the biggest farming area on the planet will say something else right? Oops, they say I am right. I guess it because they are not a farmer too! https://store.extension.iastate.edu/product/4047

>By labour, I mean manually removing weeds before they spill seeds or outgrow crops

Are you high? How can you say I am not a farmer when you think people walk around 5000 acres of fields pulling weeds by hand? Driving a tractor is labor. Literally the only labor done on a farm in decades.

>For many vegetable/fruits, manual weeding is still essential.

Maybe somewhere in eastern Europe where they are still living in the 1820s, but in the 21st century literally no farms do any manual weeding. Vegetable "farms" are called market gardens, and they use mexicans to pick the vegetables, not to weed.