Lox, Cystic fibrosis is a disease you are born with.
Homosexuality is a condition you are born with.
Both groups will miss out on certain experiences which the rest of us think of as joys of life.
Both groups will go through unpleasant experiences related to their condition.
Both are at a heightened risk of acquiring an infection that will kill them before their time.

I think that Akeneaton does regard heterosexuality as a disease.
Before denouncing him, remember that that was the mainstream public and medical belief within our lifetimes. The change is not due to any scientific breakthrough, just a change in perceptions.

We can disagree, but it is a valid point of view.