[Marsh.]

They don't make you believe anything. In my experience it was about learning about religion.

Saying they shouldn't teach it because I don't want my child to be religious is a little uneducated.

Whether you want them to be religious is very different but they should at least learn about appreciating and understanding other people's beliefs and opinions. You wouldn't want them to grow up completely ignorant to the world that we live in.
I remember that most of my GCSE RE exam was about evaluating the contrasting views on modern life by different religions (contraception, abortion, afterlife etc).

Like PSHE has topics on drink and drugs. It isn't encouraging you to take them but educating you about them so you grow up fully informed of the facts to make your own decisions.