The barrier to entry to use a CC is: I take out my CC, enter the information, and buy the game. The barrier to entry for Paypal is: I enter a username and password, click a few times, and buy the game. Yes, I had to do a few things at some point in the past to set both of those things up, but they were fairly simple, straightforward, and involved well-known, trusted institutions everyone uses. If my bank wants to see my ID, sure, fine. If some online service I've never heard of wants to see my ID, fuck off. I imagine most people are the same.
The barrier for entry NEEDS to be that I go to a site, put in traditional payment info, and get crypto in my wallet (even setting up and maintaining a wallet is a lot to ask of most people, but doable). But this will never ever happen in the US because of the potential for you-know-what. P2P markets are a non-starter. No one is going to drive out and meet someone IRL to buy crypto, and if you do it online you have to use some kind of traditional payment processor, which means you're either right back to KYC or you're violating their TOS in some tricky way that will eventually be shut down.