I get the feeling that the underpinnings of your argument points are based on not being very familiar or well read with the technology around Bitcoin and other cryptocurrencies, especially Ethereum. Your coming at it from an end user or armchair quarterback point of view, not someone who actually does development in that space; if you did, you'd know that one of the reasons Ethereum was created was to provide a digital escrow mechanism, and has been around for over 5 years. So no, your example isn't based on reality.