Would 4chan exist without /b/?

/b/ is by far 4chan's most popular board - threads on 4chan's other boards last at least 12 hours while threads on /b/ are lucky to last 12 minutes before being bumped off, and /b/ has probably had more posts than all other boards combined. 4chan's "public image" is entirely /b/, and the video from 4chan's Otakon meeting reinforces that image.

So why even have the other boards (anime, auto, nature & wildlife, etc)? It seems like they are just an excuse to legitimize 4chan. A selection of boards like http://www.gopvt.net/ (cats, harbl, memes, etc) would be much more appropriate.

4chan = /b/, /o/ & /s/

The rest of the image boards are shit and have no use.