> convince everyone on Earth to implement changes that are bad for them, like not eating animal-based foods, with only the promise of "maybe in 200 years your descendants, should your line not be extinct by then, will benefit" as compensation

There are millions of people who chose not to eat animals for different reasons (ethical, health, environmental). And this number is growing faster than ever before, as people become more educated about the issues with animal agriculture.

I don't know why you would classify it as "bad for you". It looks like you are projecting your opinions.