I have funds in my wallet. I
choose to send them to you. That is human consensus on top of a blockchain, which is the settlement layer.
In the case of escrow contracts. The funds are in a contract. Those funds will be released to a specific wallet only when two humans agree to their human consensus. The blockchain again, is the settlement layer.
When I bought my house, it went through an escrow process. I had to pay some human paper pusher thousands of dollars to do something that really could have just been done by computers for fractions of a cent and in a matter of minutes.
Escrow is one area that you're going to have a hard time arguing with me that isn't a perfect use case for blockchain. I don't care if it is 'overly complicated'... nothing is more overly complicated than the current process today.