People latch onto the successes and failures and insist that's the way it has to be for everyone.
"John Paulk was a drag queen and homosexual prostitute, and now he's married with children -- EVERYONE can change!"
"John Paulk was spotted in a gay bar -- NOONE can change!"
"Our successes are either married or celibate -- EVERYONE can change!"
"Celibacy isn't heterosexuality -- NOONE can change!"
If a young girl was molested repeatedly and developed abnormal feelings towards men as a result, can't you see that therapy addressing her sexual orientation and behavior might be appropriate? There are other scenerios. It is therapy for those who WANT it. To deny them that seems cruel to me. You can still argue that others neither need, want or are capable of change (I probably won't agree, but will concede I haven't proven it beyond any doubt).