the core issue that nobody is mentioning is that men are ultimately not the people who suffer the consequences

No, thats a major hurdle to get this stuff approved. Birth control all comes with downsides, there's no "perfect conception" except absence.

With female birth control, the negatives of birth control can far outweigh the negatives of pregnancy. But men have (essentially) no negative medical issues with pregnancy, so a birth control for men would also have to have next to no long or short term issues.