I'm not really going to debate you because fundamentally I don't disagree with you. They are doing this because they can get away with it. They have decided that degrading their product, if not the desired outcome, is certainly not an outcome to be feared because the cost savings are worth the potential decreased demand as demand was too high.
Bob Chapek and current Disney leaderships simply DOES NOT CARE about giving you the best experience possible. Their only focus is on the numbers -- what mathematical combination gives Disney the best profitability. Obviously DME is expensive, so then the question someone of that mindset will ask is whether it's worth it. Here, from Disney's calculus, cutting the costs of DME is a no brainer. The only reason to pay the expense of DME, from current Disney management's POV, is if it's a necessary expense to maintain demand. They have decided that if the diminished experience of no longer having DME results in some people no longer going to Disney, not only is that NOT a problem, from their POV, it's actually bonus side effect because it helps solve another problem they have -- too much demand.
Whether long term that's a good financial decision, I'm confident current leadership doesn't care. They never cared about the product anyway.