Here’s the post about the Lutron remote switch.
Bestbuy and homedepot selling them for about $30.
There is no reason to remove the Phillips bulb from Smartthings hub but if you want to move it to another controller later on. That’s the only way.
I have multiple versions of Phillips hue/lux bulbs and some with hue bridge and some directly to Smartthings. For me personally. I find direct connection works better for set dim level and changing color since the integration between ST (Smartthings) is not the greatest. Only problem is if you are using the bulbs for scheduling or time based event then it could be a problem with direct connect to ST since ST is very unreliable for this.
Trust me. I spend countless amount of money on dumb stuffs as well so there’s nothing to worry about.