Men are terrified of getting someone pregnant. At least women have a choice as to what to do about it. If they don't want to keep it, they don't, assuming the law permits it or the law is easy to get around. Men don't ever have that choice.
But I don't think it needs to in order to succeed. For women, the stakes are higher. For men, they're still high enough. There's no reason both people can't be on the pill. Yes, it's a bit redundant, but when your goal is safety, redundancy is usually good.
"Trust me, babe, you won't get pregnant because I'm on the (male) pill!" is going to be tough sell in the bedroom. But "guys, control your own fate with a once-daily pill!" will be an easy sell in the inevitable TV ads.
Hell, if I'm engaging in casual sex, I'm going to take both the pill and wear a condom. I've had condoms break and not notice it immediately - thankfully never at the point where I've reached climax, but I could see it happening.