While we agree UD is an unachievable goal, we would argue that the goal itself is problematic and ultimately inadequate to the continuously evolving situation of not only the inclusion of more and more disabled/extraordinary/eccentric bodies into “normal” society but also the ever-shifting ableness of any body as it moves toward inevitable failure.
UD is setting everyone up for failure, absolutely! No one is the same and every disability is a particular case so we need to focus on accommodating and alleviating as many of these cases as possible which would be far more productive and effective than actually trying to generalize the whole population and creating a far too generic design that no one will abide by in the end.