You're right they don't want to carry a musket, but that's because muskets are not sexy. They don't want superdrones either, because superdrones are not sexy.
2A people just like guns. Guns, culturally, are sexy.
I don't think it's sexy, though I wish people would stop using this word for things like... war machines. Gun culture is just a subculture in the US, and I agree weaponized drones aren't 1:1 with guns to gun nuts.