Imo technicall skills are an esssential as a pro redardless of one's size but we can also argue that as much isn't needed in the higher divisions, HWs in particular.
Bigger fighters usually have power so they often become dependent on it and don't progress technically.
Smaller guys lack power so they must hone their skills to make up for that lack of power.
That's why I love watching the guys in the lower weight divisions like 126 and down. They are that much more skilled as far as boxing ability, combination punching , defense are concerned.
To answer this question, I think different skills are necessary as a HW fighter. The klits may not appear to be skilled but knowing how to utilize what you are born with itself is skills and that makes them very skilled.
Bigger fighters aren't as fluid in their movement so I really wouldn't expect them to execute in the same way as a flyweight for instance.
Skills are not overrated but it requires different types as u go up
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