The problem is Romey, that, as Buffy and LRD have said, you're not comparing like with like.
If, for example, one of those pesky women people engages in consensual PIV sex with a lovely man. The evil nasty woman isn't on the pill, but the lovely man hasn't worn a condom then one of 2 things might happen.
- Nothing
- Evil sperm stealer becomes pregnant.
If 1) happens, then all is well, the lovely man has hopefully not given the woman any STIs and has learned a valuable lesson in contraception. If 2) happens then the woman has the choice to remain pregnant or have an abortion. There are consequences to both choices.
If 2) happens, the lovely blameless man can choose
a) to be financially responsible for the child or
b) not.
If he chooses a) all is fine and dandy, should he choose b) then there's not much the nasty woman can do, even with court orders and agreements and everything.
If the woman then chooses to continue the pregnancy, she will do so in full knowledge that the man is an idiot, and that she will not only have to come up with her half of the child's financial support, but the father's as well. She will also have to put up with the many dangers, physical, mental and emotional of pregnancy and birth, while the man gets away scott free, having his back slapped by his friends for the lucky escape.
Women take on all the risks, women therefore get the choices. Hopefully those choices are made with the loving support of a partner, but when they aren't, then her body, her choice. Men who don't want to be financially involved with their offspring, however begotten, will always find a way of not paying.