wow.... where did you study biology and evolution, you got almost everything so wrong.
Yes, hands is what make us evolved to the next stage of evolution. We have hands to use tools! One of the best things in the world are tools. Lots of animals were born with "tools", but their tools are fixed on and unchangeable.... example... Crab. Crab have great useful crab claws... but can it grab needle and thread or build fire with it? You understand what I'm trying to say... so I won't go in to it.