lesschumras,
1. It is not entirely clear that they can’t change their netiyos. Organizations like JONAH help such people.Goyishe versions of what is known as reparative therapy exist too. Apparently they are affective.
2. Would you also say that someone with pedophilic urges can’t change who he is and just accept it, or would you tell him to go for therapy and get his act together? For these urges, everyone agrees that they have no right to “accept” it, and they should go for therapy. So the only difference is degree.
3. There is nothing more natural than a male and female. Yet, the Torah fully expects men to control themselves and not commit adultery. Why should this be any different? We have the ability to control our behaviors.
4. The melachos of Shabbos are perfectly normal behaviors for people to engage in. Yet, the Torah tells you that doing these melachos results in the punishment of death.
In sum,
1. No such thing as “can’t” change”.
2. No such thing as “can’t control myself”.
Hashem created various yetzer haras, and He created the Torah as a cure.