The way “no ethical consumption under capitalism” is meant to be used is to remind us that: 1, we shouldn’t let perfection be the enemy of good (I.e. still boycott the worst people) and 2. that our long-term goal should still stay focused on replacing capitalism entirely. It is not meant to be used to condone abdicating our moral responsibilities entirely.

Participating in unavoidable harms because you need to survive is different from knowingly, willfully choosing the greater harm when you could opt out.