If a man only takes a woman's looks into account, why should I care or feel sorry for him when she treats him wrong?

Let's say a red pill guy goes out and has sex with any woman he is attracted to who will have him, without knowing anything about her character.

Am I supposed to care when she lies about birth control, gets pregnant, and takes him for child support?

When he slept with her he wasn't worried about her morals or values, just her looks.

So why worry about it after the fact?