Most women's contraception is a lot more expensive than a box of condoms or the generic Pill. And not every woman, for various reasons, can use the generic Pill.
Not to mention, in certain cultures, if a woman asks a man to use a condom, then, in the man's eyes, that woman has just emasculated and insulted him, and the consequences can be harmful for the woman or even fatal.
But feel free to talk facilely.