I heard it put this way, which makes sense to me: If it's legitimate to change your body to conform to your mind, why wouldn't it be legitimate to change your mind to conform to your body?

Changing your body also seems a lot more irreversible than changing your mind.

The only ones who should care are the individual who is seeking this and the guardians of someone who is being steered toward it. Two corporations disagreeing matters little and shouldn't be a reason for those people not to pursue what they want.

Easy enough. Tell people to work out their own problems instead of going to therapists. If we are going to get into what a doctor can or cannot say, then this is as good if not a better solution. Why is it better? No medical system or insurance. If a person kills themselves due to a crisis, well then, I suppose humanity will eventually reach a point to where that issue is no longer present. After all, for thousands of years, nobody had therapists.