You have a point but I think it's worth keeping in mind that the world itself has changed over the years and the litigations have too. I'm not saying I necessarily agree with it although I dealt with Tort issues on auto insurance where in return for reduction in premium you signed away your rights to sue (I think that was PA, NJ, or MD can't exactly remember) but that increasingly forward thinking about potential lawsuits is a more common and expected thing companies do these days because they've also had to face lawsuits much more than in the 1950s and 1970s (those eras purposefully chosen due to DL and WDW opening dates).
You are right, the world has changed and other theme parks around the world are stepping up their game in assisting those with disabilities while Disney is reducing them.
For example, Efteling park offers videos on their website, showing specifically how accessibility works at most, if not all of their attractions:
https://www.efteling.com/en/park/information/disabled-visitors/discover-the-park#video
Look around and they spell out exactly what you can expect so you know well in advance if it will work for you or not.
NOTE: Tokyo
Disneyland does something similar as well, but only on their Japanese language site, but to that end, Tokyo Disneyland is leaps and bounds ahead of the rest of Disney in terms of accessibility, they offer 3D sculptures of every character and 3D models of every attraction for the blind, the list goes on an on of what they do. And while Disney is in the name, we can’t really call them the same as Disney because it is run by another company that licenses the rights. Even Sanrio Puroland has a better accessibility program in place.
Now so far all of my examples have been in other countries ad parks that I have not yet been too, but can tell you based on their websites alone, they are doing a better job than Disney is.
There are also theme parks here in the U.S. that do a better job than Disney does:
Dollywood -
https://www.dollywood.com/accessibility/dollywood-theme-park/ and having been there, I can attest to the claim that all of the employees that DH and I dealt with were all well trained in how they could accommodate. They also have a sensory room for those that need it, which is something Disney could easily do and it would help a lot as well.
Please note that I am not referring to even their equivalents of the
DAS program here, this is accommodations for other needs and yes, all of these have an equivalent of a DAS, they all have their own quirks, but they are there. That being said, by providing the other types of accommodations, the need for the equivalent of a DAS is greatly reduced for many. And yes, many, if not all of these have paid skip the line options as well and most suggest using them when appropriate as well, but usually in conjunction with their other programs.
So, the problem that Disney is going to face is other theme parks are stepping up their efforts while Disney scales back their efforts and this will result in more problems for Disney long term.
So, yes, the world has changed a lot and it is becoming a lot more welcoming overall to those with Disabilities and if Disney continues to loose that, there will be even more problems.