When i have more than one option and limited resources I like to prioritize things so I will get the most 'bang for my buck'.

If changing our diets can help 1% but eliminating infrastructure will help 40% then you can fuck off about my diet I don't care that it might 'also help' my abilities and resources are limited and I am going to direct what I have at the biggest result. Does that make sense?

Penny wise, pound foolish is the old aphorism that applies here. It doesn't matter if the whole species eats like good little boys and girls if the 1% and the militaries they control are hellbent on burning fossil fuels for their pleasure and gain until we all cook.