The thing is, there are ways to minimize trauma, but ultimately, especially if you are prone to scarring a certain way, the FUE scars will still be visible if you shave your head.
With intelligent donor extraction and the right tools, yes it can look better, and you can buzz your head probably down to a 2 guard, but ultimately FUE, or FUT for that matter, do kind of eliminate the possibility of shaving your head.
Maybe SMP in the donor area can solve this problem.