Kr1stina a little harsh.
I think being a tomboy now is very hard, and think it is a very tough up hill battle for parents, to not let their child become influence by the Transagender.
But there will be parents who are going to be confused and upset by the distress they see in their child. Unfortunately the agender has slid in unnoticed by the majority (along with stronger stereotypes) this majority will have been told by the media to be open and accepting of all things LGBT, so will be seeking out support for them and their child. It could come as quite a surprise to find many people on a forum not sharing the open mindedness of the what media says you should. Which I presume can make them defensive of what they happily believed was right.
Also with the trans agender being so pushed in this society, the tomboy is later convinced there is a way out, of being a girl, and will rally against a parent simply saying you are girl.(unlike years ago when there was never any other option being touted)
As others have said and me included, had we been a tomboy now, we would have jumped at the chance and believed we were boys. As a young teen not listening parents and thinking you know best is a strong emotion.
So yes I can understand the distress the child will have the more the parents say no you are a girl, the more the child will escalate their feelings of fustration.
There are parents on here struggling with this, and by and large it is/was not their parenting that has led them to years of heart ache and pain struggling with the Trans agender.