I have seen statements like your over the past 20 years and your observations are common. Its mainly the consumer light industry’s fault for not educating the consumer.
Dimming CFLs and LEDs need to be paired with the correct type of dimmer to avoid buzzing as well as a steep dimming drop off in foot candles output. Why? It has to do with with CFL’s ballast and the LED’s driver and which design schema was used. A commercial lighting professional can correctly pair dimmers and lighting, but its extremely hard for retail consumers or retailer to do the same. Companies like Philips Lighting tell retail consumers exactly which dimmer will work with their retail products. https://www2.meethue.com/en-us/works-with/switches
WiFi or Zigbee enable bulbs were never intended for light sockets controlled by wall switches.
It was designed for use in desk lamps, floor lamps, up-lighting fixtures. When a misapplication happens the user experience goes bad and they get upset.
Your statement, could be true someday, “This would be a simple and awesome product that would not take much beyond what Wyze already has in terms of electrical/software designs.”
But its a three step investment by Wyze:
One, create a smart wall switch.
Two, updated LED bulb to match the Smart wall switch internal dimming approach.
Three, multiple updates to the Wyze App to allow integration and multi-condition and nested triggers.
Lighting is simple, but not easy. Its part art and part engineering.
When short cuts in learning lighting technology and application education are taken by people, frustration is always the outcome. Most people don’t know there is a four year college BS degree in lighting - not to create new light sources, but to design lighting system application or how to apply lighting properly.
Just a suggestion, look for a commercial lighting design center near you and consider visiting. Many electric utilities have pitched-in to create these places for people to learn about lighting.
I summary, your wall dimmer will work correctly when it is pair with the proper dimming light product, which could be an incandescent type lamp.
When color changing is desired, always purchase the all same bulbs at the same time for the same room, because over time all light source experience color shift and lumen depreciation with usage.
20 Year IES Member