I feel similar about my robot vacuum. It actually takes a surprising amount of labor facilitating the damn thing. I have to walk through the house and basically vacuum proof it so it doesn't eat various cords, rugs, lifting chairs up and putting them someplace so it can get under, etc. Not sure its really a labor save to when I was just brooming the entire apartment in 20 mins and not having to move anything around due to reach of the broom and it not having a tendency to eat things. Hand vacuum I can be more carefull too about the fringed edges of rugs and don't have to fold them over themselves.
I still do it because I already bought it mostly.