People do use P2P even to this day, there are lots of people who use P2P in many nations that banned bitcoin, look at what Nigeria is going through right now, central bank banned bitcoin related moves for Banks and banks stopped working with places that deals with bitcoin so right now no bank would allow you to do something like that. Which is why people are moving towards P2P and they are giving cash to each other and receiving bitcoin, that is how they are dealing in 2021 today, you think we couldn't figure it out 10 years ago?

I remember vividly that I did multiple deals with people, I sent them bitcoin and they have wired me money to my bank account, it wasn't really an anon way to do it since I got all of his information including name and account numbers and so forth but in the end who cares? We just did it anyway and as you can see I didn't use that information since I didn't cared.