I use amazon for many of the reasons you listed - but the first thing I do on a new device is turn off 1-click. I can't see this patent changing the game for anyone.
A tip: if you ever find yourself saying "why does a company have X feature/product, I don't use it, no one uses it!" you might be right on the first statement but you're almost certainly wrong on the second.
It wouldn't be there if no one used it.
Every step between a customer and completing an order is a loss of sales.
Then there has to be some sort of measurement out there on how each step causes cart abandonment (or whatever it's called).
Its the same reason sites add Single-Sign-On... click click, I'm on a website... vs filling out forms, verification, etc...
Apparently Amazon finds that adding 1-click does more good than harm.