What if I do roofing as a hobby because I enjoy it? Inspection would then be part of that hobby.
And I really doubt the FAA is going to give two twitches if I inspect my own roof to then do my own work on it.
The question was not what the FAA is going to do about it, the question was does using a UAV for roof inspection require Part 107. Your attempted sophistry notwithstanding, the answer is obviously yes, because it is not recreational flying, even if you are a recreational roofer.