We have to do it. Some of us have to do it in different ways. Doing small things where you can is all well and good but literally none of us are making a single impact in capitalism by making different choices about how we're forced to participate in it. Focus on tearing it down together rather than picking apart individual choices because those individual choices still result in participating in capitalism.
I'm not trying to manufacture anything. You're saying that poorer people are more likely to be vegan cause it's cheaper to do so. I'm offering a counter example of a cohort of people that are also poor but somehow don't know that vegan food is cheaper, so much so they're just as likely to be vegan as white people which are doing pretty well.