I think filtering out crypto makes sense even discounting any ethical issues. I wouldn't work for a defence contractor but many defence jobs are real, good jobs with benefits etc. That isn't true of the majority of crypto job postings I've come across. The crypto "ecosystem" is very much mostly scams and fly-by-night operations.
I feel the same about the crypto ecosystem, and yet this comment is correct. The value of the crypto jobs doesn't matter, and doesn't make the points go away.
A thoughtless idea that expresses something you like, is still a thoughtless idea and can't actually attain the desired goal everyone involved says they want.
It doesn't matter how much you also don't like the thing that the thoughtless idea aims to combat. It doesn't matter how much we all agree that most crypto jobs are bad.