A lot of hotels have that policy and I think it's good they don't allow unescorted guests in the elevators and like hotels that require a key card for the elevator and the lounge and I have encountered this at Hyatt and SPG as well.

I like what they did at a Ramada in West Hollywood I was at recently. I had food delivered and the front desk called and asked if it was ok to send the delivery person up in the elevator and I said it was fine. Saved me the hassle of putting my shoes on and going down and meeting the guy and it was secure for the hotel since I gave the ok (I doubt a criminal would be able to know a certain room placed a food delivery at that time).

I sure wouldn't refuse to stay at a hotel again over that policy if there were no other problems.