A decentralized network can not and will not protect you when you engage with centralized systems. An escrow or online account wallet is a centralized system, use at your own risk.
You are right. But Evolution customers were just lazy. Because this site have state of the art anti acam system. "That system, would require at least two out of three parties in a transaction -the buyer, the seller, and Evolution's administrators -to sign off on a deal. But due to its complexity, buyers rarely used the feature". So it is really stupidity that is the root of all evil here.