Schools, LGBT+ and boundaries

My kid nephew has a new teacher at school. On her first day, the teacher announced to her 10 year old students that she was once a man and is a transgender, lesbian woman.

She went on to tell the kids that her parents didn't approve of these things but she doesn't care what her parents think and does what she wants.

Now, it's caused a bit of a stir amongst parents. Some are not bothered, while others deem it inappropriate. Of course, the parents are a big mix of people that either deem it okay or have their reservations for various different reasons. Some are nervous to voice their opinions because they don't want to come across as against LGBT+ rights.

What do you think - inappropriate or not?

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Personally, I think it's one thing to teach the history, struggles and rights of the LGBT+ community. And it's another to bring your personal life to the classroom. I don't believe it's relevant for 10 year olds, or students of any ages, to know the sexual orientation of a teacher. Explaining that she is transgender, fair enough. But, I think, to go on to say that her parents didn't approve and she didn't care etc., is unnecessary. Kids go to school to learn, if you want to teach them that it's okay to be different from what is expected from them, then do it in a wiser and more educative manner, no?

That's just my take on it. What do you reckon?