About the only reason I could think of to buy smart lightbulbs would be to suddenly turn all the lights in the house red, and yell "torpedoes in the water, brace for impact!" and that doesn't seem like a strong enough argument. I'd probably only do this 2-3 times a month anyway.
There do exist products made for for a variety of Youtube/video/streaming needs, including lighting, and they are niche.
You might think "but there are many many Youtubers/streamers" but in comparison with the overall market for such lamps, they're insignificant in number.
Hue and co (from Amazon, IKEA, etc) are mass market products.
They become rapidly less useful when the toddler learns to say "hey Google" and decides to make all lights green all the time.
That's what I've done in our house. Lots of dimmers. Some are "rocker switches with a slide along the side," other are more digital "push button to turn lights on to the last setting, small rocker to adjust light level, you can always come up from 0 by using the rocker" types.
Or in another case, most of the lights are low in the living/play room, and I forgot to turn down the nursery lights, they're already winding down, walking up the dark stairs and into a dim nursery helps keep them chill. Walking into a blinding daylight blue room and then turning down the lights is liable to add an extra 20 minutes to our bedtime routine.
I will never not have voice activated lights so long as I can afford them.
* it requires you to physically go to the switch (inconvenient whilst holding a squirming child);
* it controls only one hard-wired fixture - there is no master physical dimmer for all light sources (overhead, standlights, bedside lamps or whatever else) in a room;
* it's harder to install a switch than to screw in some smart bulbs
I'll just note that most of what you complain about with dimmers isn't a problem with the correct dimmer - I don't have any dimmers that require coming to full brightness before dimming them down, no matter where they were last set.
https://www.home-assistant.io/voice_control/voice_remote_loc...
* Turn existing lights into timed night lights that turn on at a configurable brightness when I pass certain motions sensors and then turn off after a timeout (cool/useful when I'm wandering around house at night)
* Similar: Turn existing light fixtures into motion activated on switches (useful for dark staircase)
* Turn lights on in morning and evening when I'm traveling to make it look like the place is occupied if I'm traveling
* Party mode: cool colors shifting in cool ways in the rare event there's a party
* Gradually go from bright white light to softer light as the day goes on in the office, and then stay soft at night to help with sleep
* Turn on in a sequence when people are detected close by outside in the middle of the night to try to scare them off
* Turn a certain color to indicate something being off, like a server offline, water detected, etc.