Personally I don't think anyone is saying anything quite so heartless. However, outright abusers aside, it's quite clear that there are a LOT of people with disabilities who are refusing to try the new accommodations because they are not as easy or straight forward to use, or they think they should be entitled to DAS. Were they to try them, some of these people may find the new accommodations simply won't work for their medical needs, which would warrant a second conversation with Disney, but I suspect the vast majority they would work just fine - even if they don't like them as much.
At the end of the day, there's a reason why the likely majority of DAS users were people abusing the system, either by outright lying or using the service even when their disability didn't require it at that moment in time. It makes a trip to the parks way easier and more enjoyable. Disney had to do something to make it less desirable to these people and unfortunately it means some people with legitimate disabilities that can be serviced in other ways lose their DAS access.