Not really the case. Some have limits and bans but it is not across the board and many banks don't have restrictions. The issue is the bank is semi-responsible

Not really the case. Some have limits and bans but it is not across the board and many banks don't have restrictions. The issue is the bank is semi-responsible to refund if someone gets scammed and sends money to an exchange and they have been taking huge losses on this; so I imagine some are just blocking it instead.