Can someone ELI5 why at least some of the problems mentioned can't be solved by a third-party escrow[0]? There even already exist "Internet Escrow" companies, p

Can someone ELI5 why at least some of the problems mentioned can't be solved by a third-party escrow[0]? There even already exist "Internet Escrow" companies, per that article. The escrow can provide a signed message to the effect, "I, Jess Crow, have received .01BTC from Joe Buyer, and on receipt of signed assurance from Joe Buyer that monkey.jpg has been received by them in satisfactory condition, I have disbursed that amount (less my fees) to Sue Seller who has acknowledged receipt." This at least removes the question, "was the transaction price as stated, and was it actually paid". It reduces the motivation for fake transactions (immediate kickback to buyer) because of the fee paid to the escrow. Escrow could be performed in the same, informal way as proposed in the topic article. [0] https://en.wikipedia.org/wiki/Escrow https://en.wikipedia.org/wiki/Escrow