The problem is that there's simply no interest in the national seats of power for male contraceptives. Even female contraceptive technology moves at a glacial pace. The copper chain has been standard in Europe for over a decade now, but all you can get in the Americas is the much more dangerous copper coil (which can puncture the uterus). In fact, I doubt you've ever even heard of the copper chain. Even typing [copper chain contraceptive] into google brings up the familiar T-shaped copper coil device, not the free-hanging copper sleeved chain. You have to type ["copper chain" contraceptive], including the quotes, which then takes you to some German and Austrian sites. And BTW you can get the procedure done as a tourist for 300 euros.
Safe contraception is not a difficult problem to solve (for men and women), but any politician pushing it would kill their career.