Men prefer women to do it because women are the only ones with non-permanent options that are 99.x% effective.
Fact is, only the female body has a built-in 'mode' that naturally shuts off fertility, that pharmaceuticals can 'trick' the body into activating, making creating effective contraception for females extremely easy compared to the difficulty level for males.
There is no one to blame for these biological facts of the matter. They are as they are, all we can do is work with what we've got.
There's another wrinkle: pregnancy is a health risk for females, and is the consequence for unprotected sex for them. Males have no equivalent thing that happens to their body as a result of unprotected sex. Contraception needs to be at least as safe as the alternative to be viable. Therefore, female contraceptives need only to be less risky than pregnancy to be viable, while male contraceptives need to be less risky than doing nothing, to be equivalently viable.
Again, this is not anyone's fault. That's just how it is.
Not much, what's on with you?