Unfortunately, there is always wastage in any manufacturing process, and this is why you need animal protein to replenish the 'building blocks' for these replacement cells. They have two choices. They can kill these male chicks at birth, or let them grow into table chickens. Normally, it is the former that is done. Apart from the spaces and food they would use, gradually the price of eggs would become out of reach for all but the wealthy.
Veggies are one of the worst examples.
So the culture is changing.