OK, so it's unrepresentative of reality, but what's the alternative? Not have women in these roles like in every TV program ever?
www.bbc.co.uk/news/entertainment-arts-45803343
I firmly believe normalising women in these roles sends a strong message that women can do these roles to girls, women, boys, everyone.
Maybe it's a little like a show like Vikings having large amounts of female warriors fighting equally with males. Maybe not totally realistic but the alternative is another TV programme of all men.