What's p2p:
First of all, P2P is the process of performing cryptocurrency transactions directly between two people without middlemen and third party intervention. It allows you to determine your best price.
Advantages of P2P:
Its main advantage is that two people can decide the payment method according to their own convenience. Here the cost is also reduced. Work step by step as per the diagram below:
By referencing exchanges and Binance images of transactions, you rule out the idea of middle men or third parties. Essentially, the exchange is acting as an escrow agent between two parties in order to prevent scams.
Likewise, I do not believe that individuals involved can always decide how to make payments. It will require a safe form of transaction within a certain timeframe. It is possible for individuals to have a little deviation but not to go outside the rule; for instance, a request for a transaction fee, or a favorable bank.