I can set individual colors and intensity on the lights as well as with a dumb switch I can also have the lights just come on so if I were to sell the house or whatever the next person wouldn't need to have home assistant to work anything in the house.
You can't control color easily, but you can get dimmable smart switches. I find for most lights, I don't change the colors pretty much ever. YMMV.
To change for another scene, have a button or voice command?
I’m with you here - make control „as usual as possible“, also saves a ton of money and annoyances - and most important: home automation is about automation, not controlling manually via phone…