LangCleg I totally see where you are coming from but a parent of a trans identifying youth or child is not entering into a relationship with them, they are already in a relationship with them. Children, child or as adults, can attempt to control their parents and vice versa. I think it is hard to work out where control is actually a parent lovingly guiding a child (e.g. setting parameters for what they can wear etc or a child saying they are grown up now and will do things their own way!)
The issue here is that Emma/Scott is now an adult and lives with mum or dad. So E/S has a choice to move out. But probably, (I am guessing) mum and dad are happy to have them still at home. So it is working out who gets to do what.
This is something that probably a lot of parents do struggle with. How much children (adult or otherwise) get to dictate things in their lives/their parents lives. On paper (or the internet) we might say one thing but in our lives it's another thing.
I see the E/S desire to remove the photos (because they cause distress) as being relevant and the parent eventually accepted their child as Emma. Or appeared to. This meant they and their child were happier. And they found a way forward. I think that is good. Not just for E/S but for their mum too.
It would be a whole different thing, to me, if we were talking about the women with trans identifying husbands. I think those poor women stayed when maybe they should have broken lose and chosen to live their lives without their partner. But as a parent, it is a totally different thing, IMHO.
"Trans is not an excuse for controlling behaviour." I agree but I think it is so much more complex than that.