IMHO almost all hotel locks are secure enough. The question is always: how easy is it to get into the room without key? (Think about fooling or bribing the maid, no high tech needed at all). The other side is: how expensive would more secure locks be? Especially with regard to maintenance? My conclusion is that the main reason for high tech locks is to make the "lost key scenario" cheaper.
Anyone who thinks that electronic locks are here to increase security is completely on the wrong track.