Every single one of those examples took place because those wrestlers had to either cut or sit. All of them would have sat at their "more natural and healthy weight" -- which is a subjective standard. All of them met the objective standard: NCAA Certification rules.None of the examples you've listed should have ever taken place. Do you think any of those guys looked healthy (even with time to rehydrate) wrestling last year? IMO with the scale at the scorers table, any attempts to wrestle would have resulted in failure followed by an immediate return to a more natural and healthy weight.
As a side benefit moving the scale would help to promote one of the core attributes of wrestling; that being people of similar size compete against each other.
Denying this is denying both the competitive nature of elite athletes and the Law of Unintended Consequences. They will not accept sitting out the NCAA Championship if the rules allow competing. If the rules are changed to make weigh-ins 2 hrs later, they will simply not eat or drink for 2 more hrs.
If you want to couple mat-side weigh-ins with a change to certification rules -- raising the minima by increasing the target bodyfat % -- then maybe you're onto something.
But even then, this will never happen. The NCAA and the Coaches Association will never risk an NCAA Finals forfeit because one wrestler flunked a live, televised mat-side weigh-in.