In full disclosure, I'm making an assumption here. But think about it. It's a super light magnetized item designed to affix to your phone using that magnet. How does this release when you pick up your phone? We are always going to have to do some extra work to remove the magsafe from the phone if we are picking it up off the nightstand in a sleepy haze.
And look, I don't want to be casting shade over Apple here and I know magnets are magic, but really, there's no way that puck isn't going to travel with your phone, unless you invest in some tape to hold the puck down on the nightstand, or get a MagSafe charger that its own weight offsets the magnet pull of the device.