I agree with Calvin Hops.
Flight crew walk arounds are cursory checks; final absolute checks must be a maintenance function.
Eg: If for any reason a departure is delayed by last minute loading and the loading truck unknowingly punctures or gouges the fuselage, the flight crew cannot be aware of that! Only the final THOROUGH INSPECTION by the maintenance crew can ensure absolutely nothing unacceptable.
The captain signs acceptance well before doors finally closed.
Unless we want to flight and maintenance logs to be signed after a walk around inspection by captain just before start...it would be an interesting new procedure. Then someone would want captains to inspect every cargo loading, every DG or NOTOC items. Damn it, check fueling panel latches as well! Check doors properly closed by accessing CCTV pictures through iPads as well........👿