Firstly, some Dumbbells are extremely heavy, if we Convert into a Dumbbell, even we will now become extremely heavy!
Secondly, some people have a habit of throwing dumbbells after using them, if we Convert into a Dumbbell, the same may now happen to us!
Thirdly, Dumbbells don't break easily, if we Convert into a Dumbbell, we may now easily survive huge falls!
Lastly, if we Convert into a Dumbbell, we may now get gym membership for free!