Why, if I said I paid and you say I didn't and I release my side and you don't release yours then although there is not 100% proof you did not get paid it looks shady as hell.
So I can make you look shady by claiming I paid you and releasing my fake side and by definition you couldn't release yours?
It seems you want to transact with people whom you trust and don't trust at the same time.
You trust them to provide the goods/services you pay for, but
You don't trust them not to disclose tx info without your consent.