Because people with no interest in anime see it as a monolithic genre defined by the unbelievable wasterfall of fanservice isekai drivel. Pretty much all forms of animation still bear the burden of being seen as a genre within a medium rather than a medium themselves.
I have 64GB as future proofing (ITX board, two slots, can’t address any more). Normally I probably use 8 to 10 of those doing things like gaming and hoarding internet tabs like they’re a nonrenewable resource. I actually managed to crash my machine with an out of memory condition compiling something a while back. I don’t remember what and I’m sure it doesn’t count as regular use but I installed ZRAM to prevent it from happening again.