This can work out because there are still other ways to purchase a crypto not just through banks. Some of them are already given by the users in this thread but don't worry because I don't think many banks are going to agree with it as they know that they are getting a benefit through this because like you, there are people who find it easy to use banks to purchase a crypto.
Right p2p purchases could do the work but p2p won't work in long run. Someone does have to buy token at one point and gov could make this illegal if they want.
P2P sites are like a decentralized exchange so no governments can interfere with their operations and so far I haven't heard any P2P sites that have been shut down by the governments. They are not like the mixers where the governments are always after them because these services are often been used by the criminals. It may be possible that some P2P sites will be shut down by their owners but the reason for it is different and not totally related to the government.