The main drawback with keeping the switch "dumb" and only using smart bulbs is someone can turn off power to the bulb etc, which is why I and parent commenter focus on automating the switches. If someone turns wall switch off and its dumb, you can't turn the "smart" bulb on with home automation regardless of what tech is used inside it. Focusing on automating the switch generally has best returns on making most dependable system, as you will always be able to get the light back on. Again, I only recommend smart-bulb only if you are a renter or similar and can't mess with your switches.

Zigbee access to the bulb is great for stuff like changing whitebalance etc though. In my own home I have the bulbs and the switch on ZigBee so I can do this, but power on/off is solely preserve of the automated switch.