Picture #1 If you aren't impressed with that, how about this-
I was in the garage (at the million dollar Monterey house) and the garage door opener was mounted the SAME WAY. How's that for scary?
Picture #2. Remember. This was the previous owner, not an electrician. If you're looking for a ceiling box, or a pancake box, or even toggle-bolts or a moly, you won't find them. They weren't there.