There is a zero percent chance that I would ever want to boost my AirPods case, (which I charge every few days) while draining my iPhone (which I charge daily). If I had an Apple Watch, I would not bring the puck charger with me anywhere. I don't think that "most people" would; a subset of iPhone users have purses, and a subset of iPhone users have Apple Watches. I'm pretty sure the intersection of those two subsets is not even close to the majority of iPhone users.
The "charge iot thing wirelessly from phone" feature on my Samsung phones for the past few generations isn't used every day but it is useful every so often. E.g. go on a trip but forget smartwatch charger. No problem the phone can do it in a pinch. Or: family member gets their phone wet causing it to not charge wired until it dries. No problem my phone can charge their phone wirelessly.
