Damien

I don't have a problem with that stuff but it was ham-fisted in its delivery, same later when they were saying the Doctor would 'get it' if he was still a woman. I am very much a 'show, don't tell' when it comes to politics in film and television. If you want to make a point then tell it via the story and construction rather than have a character literally deliver the message via a line of dialogue only tangentially related to the story.

In the line mentioned, there is little reason for the Doctor to 'assume' the gender of the thingy. Just have him use 'They' rather than have the family, only moments after coming into contact with an alien lifeform, be bizarrely transfixed on the pronoun used to refer to them. It takes you out of it.