Alright I'm going to admit I chose my words a bit poorly in that quote. Sorry. Because it was not my intention to judge the "effectiveness" of individuals, but rather comment on how populations of people navigate the world.

Which is what the post was originally about. That huge swaths of US folks are reading at a below-par level. This isn't about differences in ability or intelligence. If at the population level, literacy is low, that's about education, or some other influence.

And if large numbers of people are less able to access information, that's a problem. That limits those populations.

People are able to process information and the world around them in a variety of ways, you not seeing it as effective, or it not being for you, doesn't mean it isn't.

While one of my statements was badly worded, now you're starting to put words in my mouth.

And those who still struggle should be supported where they are, not expected to fit in to the abled (and capitalist) "box"

I did not say otherwise, and I would not say otherwise, because I agree.

people struggle because society is designed to exclude them, not because these arbitrary skills are necessary for survival, except for in a capitalist system which only values "productivity"

Yes. Two frameworks of disability. The ableist framework locates the "issue" in the disabled person's body. But that's arbitrary, and we can easily think of the issue being located in the societal constructs that don't take into account different people's abilities, and are thus not fit for purpose.