You will basically depend on p2p, which lacks security and is based on trust. Where is the trustless here?
Bisq as a p2p platform is trustless and very secure, the trading funds and security deposits are locked up in a multi-sig wallet, and the wallet key holders is only the trading parties involved, this is perfectly trustless and secure in my honest opinion.
I agree that Centralized exchanges are more convenient and have better liquidity, but true p2p platforms like Bisq are trustless, more secure and perfect for privacy. Needless to say that there are a lot of fake decentralized exchanges that are indeed centralized are not secure, and they should be totally avoided.