It's not possible to argue in good faith if you're just going to resort to "taste buds" nonsense.

Of course if there's zero benefit then we should expend no cost on something. You may as well argue that we don't need literature, art, friends and family, freedom, sex, etc. It's just your brain cells and neurotransmitters, right.

If you don't care about eating meat, that's cool. I'm glad - genuinely - it's scarce, so the more of you there are, the better off I am.

Cheers.