"Disease" is an emotionaly loaded term, and the people with the respective conditions may have easier life due to such campaigns. On the other hand, we mustn't forget that they would have even more easier life without the condition.

Obligatory Gideon's Crossing quote:

Mother [to a black doctor who wants to give cochlear implants to her daughter]: You think that hearing people are better than deaf people.
Doctor: I'm only saying it's easier.
Mother: Would your life be easier if you were white?

With that said, I agree those sound like rationalizations.