Don't disagree with any of these also being very significant, personally I wouldn't mind if these folks also got the pax. But
a. these aren't considered "permanent" in the general sense (you can get rehired/remarried), and b. permanent disabilities are much "easier" for a govt to classify than to spend resources everytime someone needed assistance
And > Otherwise they should restrict it to disabilities that actually have a medically demonstrated increased risk of severe illness or death from COVID.
ADHD does have a medically increased risk of severe illness or death from COVID. Perhaps not "directly" like someone on immunosuppressants, but as someone w/ adhd and another chronic health condition (T1 diabetes), adhd makes it several times more difficult to handle my health (and T1D has life threatening complications within arm's reach of poor management).