There's nothing wrong with it. And like you said, it's because the mother had ill intentions. And do keep in mind they did mention conversiont herapy, and that is a form of therapy that is invalidating and harmful. So no, getting therapy to work through one's mind and emotions isnt bad. However, if the therapist or those involved do not have good intentions then it is more harming than beneficial. So I do believe she should appologize for her intentions.
The same way that some thereapists may have biases against sexual identity and gender idnetity, people have biases about therapy. It's not about people having an issue with therapy, but why and how we can resolve that 'why' so people can truly find the help they need :)
What's wrong with therapy? Like tbh I'm personally not qualified to help my kids through the struggles of something I personally cant relate to. I think taking him to group therapy was a great way to get them to understand each other. I wish the mom did it for slightly more innocent reasons but I dont think its something she should apologize for. It's like everyone involved saw therapy=brainwashing