>>1983269>/b/ split off from /a/ in the beginning strictly due to FYAD faggots making ADTRW fags cry for making fun of anime which is why /a/ is so insular and elitist unlike other weeb boards. This isn't exactly true. /b/ split off from /a/ because /b/ used to be the anime board, but because it was also a random board it was mostly filled with anime jokes and shitposts instead of discussion. Animefags wanted a board specifically about anime discussion so they didn't have to wade through shitposts and jokes so /b/ stopped being Anime/Random and just became a general random board and /a/ was created.
>If it was an anime site, there would be no other boards.Imageboards, like forums, are allowed to have off-topic boards, anon. Go to any cooking forum, runescape forum or body-building forum and half of the time they have entire off-topic sections where you can discuss things like music or politics with people who like cooking, runescape or body-building. Are those no longer cooking, runescape, or body-building forums? 4chan is a website for hobbyists who generally like Japanese things to discuss Japanese things and non-Japanese things with people who like Japanese things.