It's not "you first". There are perfectly good replacements available, we just need governments to invest heavily on replacing them instead of using that money to maintain the status quo.

I've already substantially changed my lifestyle to be more sustainable.

I don't own a car, I don't eat meat, I consume very little and try to buy used things instead, I repair all my things as much as possible, I try to steer my investments away from anything close to fossil fuels.

Now you.

I do everything you just listed. But that was by choice, and I know people who won't want to e.g. ever give up eating meat.

We have to accommodate these lifestyles (and build tech to make it more sustainable) - people generally don't want to go 'backwards', even if you or I don't perceive that as a problem.

Ultimately it's irrelevant, because both of our lifestyles are still heavily carbon negative without offsets. We both own a computer or live in a house I assume? That's why I'm sceptical of the "just live more sustainable" movement.