Cooperation always requires this kind of coordination, though. It's equivalently messed up to do something like say "You can borrow my car on Thursday to drive

Cooperation always requires this kind of coordination, though. It's equivalently messed up to do something like say "You can borrow my car on Thursday to drive to the doctor" and then wait for the person to show up on Thursday only to say "Nope - changed my mind". Basically - cooperation requires honor. It requires that parties value that the things they say they will do are the things they actually do. --- My biggest problem with the current administration is that - regardless of what you might like or dislike about their policies - I think it's impossible to argue that they are honorable. They explicitly do not value what they say. They are dishonorable - in the rawest, most traditional meaning of that statement. That behavior inevitably leads to strong social backlash from the other parties involved. Some psychology studies strongly hint that this is literally built into us: We value punishing bad behavior even if it means loss more than we value accepting it at a gain.