I think that part of the problem in discussing anything that involves Disney policy and making statements such as "I think some guests care more about this situation than Disney", is Who is Disney?
In this case is it the VP over Food and Beverage for all WDW, or is it the CM at the food court making minimum wage? Believe me if you think they have the same ideas about policy you are wrong. Disney is so large that the CM at the Food court register probably could not even tell you the VP of Food and Beverage is. All he or she knows is his or her immediate supervisor.
Now unless you have the opportunity to speak to both I don't think one can truly say what Disney does or does not care about concerning the Dining plan or other issues.
Also as I stated earlier change is slow coming to Disney. Executives, legal teams, marketing, resorts, food and beverage, and many other areas have to be involved in each and every change. This takes time. So change might slow coming. And at times it might not come at all.
If Disney has an idea on how a situation should work such as the dining plan and how they wanted it to work and that is not happening, certainly they are going to weigh many things in determing whether to make changes, and Yes revenue is a huge part.
If the loss of revenue by abuse is less than the cost of change, then they will just accept that. That does not mean they like the abuse, it means they are willing to accept it.
I truly think if Disney had not meant for there to be differences in eating off the dining plan for adults and children, the cost would not have been different. They could have easily charged a person charge and not an Adult charge and a child's charge. There is no way I will believe at $10.99 they wanted kids (or adults using kid credits) eating a $30 steak.
To me it's like buying a newspaper from a newstand. I put in my 75 cents and I am "expected" to get out one USAToday. Yes I could get all of them, and no one is going to stop me, but I know that is not they way it was meant to be. So I take one paper.