He says more scaring not worse scaring.
He means that in a strip there is one scar and it is more visible. In FUE, there are hundreds or thousands of scars (one for each extraction) but the scars are very small and far less noticable.
Any time the skin is cut, there is a scar, you can't avoid that. From what I understand, even if the head is shaved, the scar created from the FUE punch difficult to see.