With AIWB a person can “look” the gun back into the holster (I don’t remove the holster when reholstering, too many distractions getting the holstered gun and holster back inside my waistband). With 4:00 carry, I don’t see how in the world you can be sure nothing gets in the way on putting the gun back in the holster. Personally, I feel safer with AIWB than I would carrying at 4:00.