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But that platform, or kind of, has been there for centuries. When you exchange fiat person to person, just like gold and silver coins a few centuries ago, that is a peer-to-peer exchange. How are they going to regulate it? Now, with the advent of cryptocurrencies and Internet, we are taking this exchange to the next level by removing distance from the equation completely. If you ask me, that's a natural course of events, and preventing or hindering it would be like trying to stop a freight train. Typically doesn't end well for those trying.
You may be confusing peer-to-peer with decentralisation, these 2 doesn't necessarily go in pairs. Binance is/will still be a central entity providing platform for P2P traders and as such, they could be forced to impose limits and comply with KYC requirements.
I should probably agree that P2P payments aren't always as peer to peer as we might want them to be, meaning there can still be a third party making such transactions possible, apart from the network itself which can also be considered a third party of sorts. But it just means that P2P transactions are possible in both centralized and decentralized environments. As this topic is about decentralized crypto exchanges, I think we should expect P2P transactions being made in a truly decentralized manner, though, honestly, I don't know what Binance may mean by that phrase, that is Decentralized Crypto Exchange.