if you don't believe homosexuality can be cured, and...
No, there is no "and". At most, I believe someone's sexual orientation can, possibly, adapt, depending on their circumstances. That's not the same thing as "change entirely". Someone who is completely homosexual isn't going to become hetero. At best, they might find themselves tolerating or even liking hetero sex as well, and... that's probably pretty unlikely. I can't speak from the perspective of someone who is
gay or bi, though, so, it's not exactly an educated opinion. I don't have any clue what the self-realization of a person in that situation could have been like.
Also, now it's "cure"? Really? I fail to see why it's a "condition" that needs to be "cured". I mean, the only argument that could make any possible sense is "biologically it's a failing since that person won't be breeding", yet not only is the human race hardly in a threatened position, but even without medical help, I'm fairly certain two gay people of different genders could probably still get the woman pregnant if they were that
determined to have kids.