I don’t know anyone, that remembers the day they decided to become a heterosexual instead of a homosexual.
Normally developed people don’t need to “decide” their sexual orientation. It grows in them naturally until it is fully mature. And it is unerringly heterosexual.
But if some trauma arrested a child’s sexual development before it had a chance to differentiate, the child may be (pathologically) homosexual. That is a mental illness and can be treated.
Having studied art and having worked in the arts in a large city (where everyone in the arts was acquainted with hundreds of gays), I saw many men make this decision back in the 80s, when AIDS started decimating their social group (I am a straight woman). As many as could, got out. Some got married heterosexually and had children. One of those couples whom I knew fairly well is still married today and has grandchildren.
As the article says, orientation recovery isn't an on/off switch, and some people who try may have relapses, like with alcoholism or other disorders. But I saw the change happen, among both men and women. It had to start with a decision to try.