as tainted coins are a thing, the more businesses use AML tools like AMLBot, the more you need to check the coins you are going to buy p2p in order to be able to spend them later without problems.

True, but once a Monero user withdraws they lose track of it with nothing further required.

Bitcoin requires extra manual steps that require a fair bit of knowledge, money, time, and tedium. This is why vast majority of Bitcoin users don't coinjoin.

It's not just that though. Even p2p, you still don't want anyone you transact with to know your balances and tx history. Even if they are people you know.