Read my very next line where I said that these are at completely different levels of importance - it's an analogy, and one which I must admit I knew someone would probably jump on
As for your towing company, right now that's not a company it sounds like I would entrust any business to. Just what were your guidelines for not helping somebody, who is possibly in a lot of distress, because 'you didn't feel like it'? Were they already signed up, were these guidelines clear and open, can you just turn up and say nope and walk away ?
The difference is Amazon havn't got guidelines - they are accepting books, then on some apparent whimsy getting rid of them, and providing authors and customers no reasons as to why.