Conversion therapy isn't real though; you can't make someone not be gay. From the parent's perspective, their problem is likely that they think they have a religious obligation to not accept homosexuality (perhaps their place in their community depends on this), but also want a relationship with their son, and don't want to have to choose between these. So probably what they really want is for their son to go back in the closet in a way that is plausible, and the service they are paying for offers that plausibility and creates the greatest possible chance of it happening (being nice to anon and letting him know he has an undo button without feeding him bullshit or being pushy).

So on second thought, maybe it's not unambiguously wholesome, because it is lies and could be enabling a homophobic culture. But on the other hand it's probably for the best that this sort of conflict be put off until anon is no longer a teenager who is totally dependent on their parents. Whether the money was earned honestly I think is less of a big deal here ethically, it's basically in the same category as paying for a consultation with a psychic, the sort of thing where they are all but explicitly paying for the fiction.