The reality is that a lot of privileged people get the accommodations they need, they just don't blame it on personal impairment. People in the C-suite routinely have personal assistants to help them keep their schedule on track, write their correspondence, etc.
They may be incapable of doing those tasks themselves but no one acts like they should. A lower level employee who has trouble spelling may be deemed incompetent. A higher level employee who can't spell gets automatic accommodation in the form of having their administrative assistant deal with their correspondence or check their writing if they write something themselves.
There were a lot of things different in the past compared to today. In the time of President Lincoln, average education level for adult women was second to fourth grade. At one time, it was fairly common for people working on farms and the like to stop attending school after 8th grade.
With an increasingly complex society, the expectations for "basic" competency at a lot of things is more demanding than it once was. This is not about feeling sorry for a few whiners. This a societal shift and we can figure out how to do this better or crash and burn.