I think the issue there arises when you have to train a new AI to use suction cups instead of one that knows how to manipulate it's hands for any task... Like holding on to suction cups.

Purpose built robots require more labor and training than designing one that can do nearly everything, you also got a much larger market.

Also, just being cheeky here, but

>The people upvoting you and downvoting me are limited in their thinking.

doesn't sound like cheeky, it sounds like condescending and arrogance.