Hormones cloud all sorts of otherwise reasonable judgement as well - I'm guessing if you pay attention, you'll notice it in yourself as well.
In addition, this can be dangerous for those that shouldn't get pregnant for health reasons, yet can't get sterilized (there are many doctors that won't sterilize childless people, nor folks that are young - and it is often not a covered procedure).
Folks that have reasonable intelligence, pass high school biology, and have a reasonable understanding of health should understand these down sides. A bit of understanding of risks and statistics would probably lead the person to assume it is a lesser risk to use another form of contraception or two.