To which my reaction is:
Don’t want kids? Don’t have intercourse. Fair has nothing to do with it.
That doesn’t mean “don’t have intercourse if you don’t intend to be a parent right now”, it means “don’t have intercourse if you aren’t willing to be a parent right now, if the condom breaks or the pill was expired”. Go right ahead and take a chance if you’re willing to step up if things don’t go your way.
The best advice my dad ever gave me growing up was as a young adolescent, when he told me that it would be a damn good idea not to have intercourse with any woman that I couldn’t see marrying and starting a family with - because that’s what I might end up being expected to do.