Because it's cheaper. People are marketing victims when it comes to beer. It makes no sense. If you really want to spend more money, buy the cheaper beer and drink more of it. Of course, there's one type of beer looked down on even more than cheap beer, and that's homemade beer.
Nobody wants to drink somebody else's homemade beer.
If you make homemade beer and you think your friends like it, you're living in a dream world. Even so, beer is beer. And homemade beer is even cheaper than cheap beer. So I bought a home beermaking kit. I found beermaking really stressful, and it took me a while to figure out why.