Where are the womyn of Middle Earth?

This critic of Peter Jackson's version of The Hobbit doesn't appear to have read the books as an adult either:

I did not read The Hobbit or the Lord of the Rings trilogy as a child, and I have always felt a bit alienated from the fandom surrounding them. Now I think I know why: Tolkien seems to have wiped women off the face of Middle-earth. I suppose it’s understandable that a story in which the primary activity seems to be chopping off each other’s body parts for no particular reason might be a little heavy on male characters — although it’s not as though Tolkien had to hew to historical accuracy when he created his fantastical world. The problem is one of biological accuracy. Tolkien’s characters defy the basics of reproduction: dwarf fathers beget dwarf sons, hobbit uncles pass rings down to hobbit nephews. If there are any mothers or daughters, aunts or nieces, they make no appearances. Trolls and orcs especially seem to rely on asexual reproduction, breeding whole male populations, which of course come in handy when amassing an army to attack the dwarves and elves.

Perhaps for her next trick, Miz Konigsberg can lament the lack of women in movies based on the Apollo program, the medieval Papacy, and the National Football League.  Personally, I think it is absolutely obnoxious that Jackson, or more accurately, his female co-writer, dared to create characters, male or female, who don't exist in the books.

She doesn't even appear to have seen Jackson's Lord of the Rings trilogy, or she might have noticed Aragorn marrying Arwen, Eowyn pairing up with Faramir, and Samwise marrying Rosey.