How is this supposed to be good faith advice? The mentally disabled person may earn $15/h as a janitor or $25/h in some high productivity job that would usually pay $60/h and requires a college education but also has some accomodations for their disability. Mental disability isn't linear and it isn't a discrete yes or no either.

It's like everyone here is taking some extreme edge case as the baseline for mental disability where it is immediately obvious that they can throw them into the "too dumb" bucket.