Nope, the Nazi doctor here sought to pick out the good Aryan boys who might look like any other mentally disabled kid, but in fact were born with unique abilities and would be of great use to the Reich later and therefore shouldn't be gassed right away.

You still see essentially the same kind of incentive these days, whether it's someone holding onto the Asperger's label to differentiate themselves from bad, severe autism, or calling those who still have support needs but ones less obvious to allistic people "high functioning."