Simple disagreements suffice. I don't have to make an argument for something just because you bring it up. I'm just pointing out that you bringing it up (hmmm - without backing it up!) doesn't make it a valid point.
You seem to have a bone to pick. I said owned storage is cheaper, and you made up something about it not being redundant. You're not making a salient point as much as you're trying to handwave and dismiss owned hardware as complex, expensive, not worth the "value" one might get from S3, whatever.
If you REALLY think that storage can't be cheaper than "cloud" unless it's not redundant, then show us numbers. Otherwise, you're just making shit up.
You mention all your other things as if you're saying, "Gotcha!" You still have to monitor Amazon. You still have to manage backups. You still have to monitor resource utilization. You're not being clever by trying to imagine that other admins are as bad as you are because all those things seem hard. Good admins do those things no matter where their stuff is running.