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.
Your not eating animal products does jack shit for those people, sorry
A comparable action to giving a homeless person money would be fostering animals or donating to orgs that help animals