a.) A lot of shows have literally no other choice these days, at least during the airing season
b.) It can take a year or more for all BD volumes to come out and get subbed, during which time there again might be nothing besides HS
c.) If the only non HS option are shitty meme or over-localized subs (i.e commie does that a lot) then fuck them, I'd rather have HS just on principle that I don't want someone with a mental age of 13 actively trying to interfere with my Chinese cartoons.