It is doing business with a corporation, but it's not not doing business with peers at all.
Also, if you have any common sense you have to do business with the corp anyway to do your withdrawal.
I can see how it would be annoying when a lumberjack in British Columbia wants to sell his truck for a mattress full of dollars, but in the real world the money was already in a bank, so not doing business with that bank wasn't an option anyway.