Hypothetically, if a colleague has repeatedly demonstrated the utter lack of reading comprehension skills (like pulling the same door labelled “push” for the hundredth time), what job could one suggest for them where this “disability” wouldn’t be detrimental?
The example you’ve given is likely not a problem with reading comprehension but obliviousness. I read and understand things very well (I have to read and correct engineering drawings and schematics and implement them), but I simply don’t notice a lot of what goes on around me.
My suggestion for that is any job that doesn’t require safety, physical team labor, or security.