Right, I agree with you that in the case of NYC you're getting a great deal, but in other places you do pay a heavy premium for a hotel. For example, I checked a few places where I know you can get a 1br for $500ish a month, and hotels there are mostly more than $100/night, which is ridiculous.
Furthermore, I wouldn't say that the concierge or security are worth mentioning. I know personally I feel about as secure in a hotel as with an Airbnb - or at least I'm always aware of the possibility of theft from hotel rooms.
I understand labor costs etc are a big part of the price, but I wish there were more low-cost hotel options. Not hostels, but an actual room to yourself. Why does that have to be expensive? Just cut the room area in half and half the price! Yotel is nice, but they're still not cheap, and don't have many locations.
If there were low-cost hotels available, for $30 a night or so, I'd spring for them much more often. But when you can grab a nice-looking Airbnb for $25-30, vs a motel for $50-60, it's hard to justify the motel.