This is the food equivalent of "well why don't you just use rust or scheme to solve that problem?"
Because people like meat. It tastes good, it's comforting. People like meat, that simple.
> And if they don't make sense in your dish...why eat that dish?
For a lot of people, cooking and eating is something they have to do but don't particularly care for. Maybe homie just wanted to have spaghetti with meat in it like his mom made all of his life. And now you're telling him that he should just eat something else entirely because he doesn't use quinoa in his spaghetti.
I'd rather have a bit of ground beef in my spaghetti than anything you listed. I could do mushrooms but I just... Like meat more.
So, yeah I'm stoked on impossible meat.