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.
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.
* 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