Using VR controllers to flip buttons and switches is absolutely wonderful. It works fantastically. Maybe it only “seems” like a good idea to you because you have a VR system with poor tracking, but I don’t, so it doesn’t “seem” like a good idea to me; it “is” a good idea. It works great in dozens or hundreds of other games, and is essential to the VR experience. It’s not a waste of dev time at all. In fact, making a VR experience/game/mode that does NOT utilize motion controls is arguably a waste of dev time.
More options for more players who might have different experiences, setups, or needs than I do is never a waste of dev time, as long as they are indeed options that aren’t forced on me or anyone else.