This sounds like it would make sense on the surface, but is just not true. You can look up pretty easily that there wasn’t really any research on the viability of male hormonal birth control until half a century after female hormonal birth control became a thing, so it’s not like they made a rational decision based on scientific findings. When they found out how to do it for men, it was roughly comparably complicated, with similar side effects. This too is easy to look up.

It makes sense that the side effects were too much to legalize hormonal male birth control because today’s standards are much higher. Which is a good thing ofc- im glad they don’t allow new medication as easily as they did in the past. Female birth control wouldn’t be legalized if it was invented today, and neither would, for example, aspirin. They get to stay around because they don’t take that stuff back out usually, even if it wouldn’t pass modern standards. That’s a bit of a tangent though.