Are EA billionaire philanthropists actually effective in their 'altruism'? (spoilers: no)
(bobjacobs.substack.com)
Does moral cowardice matter in someone teaching about ethics? Yes, just as much as physical cowardice matters for a life guard. (The other way is fine.)
Does he express his ideas and teachings as something that it would be good if people did, but he totally wouldn't if it causes himself a smidgen of inconvenience? If he didn't, we now know that he was lying. Which matters if your moral framework cares about truth.
If you have to read his works for some reason, do it with open eyes and try to figure out who and what he is lying in service of.