If you could give and receive your money at anytime, like at a regular casino, there would be no problem in reversing a withdrawal. I am sure there are several psychological issues that go on, and I'm pretty sure the bingo halls and casinos know most of them and use them to their advantage. It's a business, and they can't just give it away all the time.
I don't have the experience of many cashouts at a casino site, so can't really give input, but several on bingo sites. The majority of the time, I lose it all, but a few times it's paid off. It is unfair to have to wait a week or more before you can deposit or participate in specials. It is brutal at times. You miss playing. You miss your roomies. You mostly miss having control over your money!
Anyone else have conspiracy fantasies about the sites KNOWING your playing patterns and KNOWING you are going to take your winnings and blow it all on slots? It sometimes feels like they turn the switch, curl their moustaches, and let out sinister noises of glee that they have you snared. I know that's (probably) not happening, but then again, I've read some stuff about a site that totally made it so players can't win, and joked about it while doing so.