I am not an expert on Downs kids to know how majority looks like (are you?) Here in CZ, I knew of one preCovid cafe that employed adult Downs as waiters, and they absolutely needed supervision most of the time - cannot take the complicated Prague public transport alone. Maybe it is different in rural settings where there is just one bus line that never changes its course.

That said, prospective parents usually don't make their decisions to abort or not to abort on an expected median outcome, but some of the more pessimistic-but-realistic scenarios.