Are EA billionaire philanthropists actually effective in their 'altruism'? (spoilers: no)
(bobjacobs.substack.com)
Nothing about a philosopher's person matters as long as they're able to put forward coherent philosophical arguments. If a conclusion follows from a set of assumptions and an argument, what does it matter if a five year old or a tree presented that argument?
Sure, if you distrust the source, that invites deeper scrutiny, but it cannot in itself invalidate an argument.