I agree, that would be ideal. I think I read around here (or maybe ST forum) that one reason they haven’t is that the smart fan control switches are currently limited to their higher-end product lines so perhaps they are trying to keep it that way.
As for the Hampton bay zigbee fan controller, I know the strength of their zigbee radio can make it painful to deal with them. Although I’ve never had that much trouble and it seems as though most people’s issues can be solved by strengthening the zigbee mesh.
But I agree, if getting on a ladder or dealing with wiring is a huge negative for someone, then it’s not the best option.
The sonoff controller looks interesting, but without reputable safety lab certifications of some type, I’m passing on that one.