Re: WTF?
First thing I thought was how f'ng annoying* it'd be if there was a remote exploit that allowed you to do this to other people's lightbulbs & re-pair them to something the owner doesn't have.
(Ok, fun. Especially if it's an annoying person who's busily extolling their virtuosness in buying a stupidly expensive lamp that they can control with their iDiot phone.)
((I'm also guessing this was cost driven, ie the cost of making a paperclip hole and switch vs a bit of software. Or 'elf and safety. If someone's dumb enough to need a smartphone to turn on a lamp, it's probably not a good idea to have them poking a paperclip into it.. Although Darwin might approve.))