Not that you can see, anyways.
When you have an advanced aeronautical engineering degree then perhaps you can comment further. Until then, all you say regarding the matter is an opinion. Remember that.
Actually, he can see. They are called inspection plates for a reason. There are also long-reach cameras with flexible heads that can be used for inspection.
In addition, one does not need an engineering degree to assess the airworthiness of an aircraft, just an A & P license or in my case as a homebuilder, a repairman's certificate for that individual aircraft.