What's the holdup on male birth control pills?

There are, but ......
They are less reliable.
Still have more serious potential side effects.
I agree with your thoughts anyhow

Because there is an agenda at play and/or it's not as profitable.

They don't want people having too much control. The elite want more tax slaves for their permanent underclass.

Pfizer went bankrupt, I think

{@wiseacre] 😄 apart from cutting off there privates and becoming eunuchs i do not think there is really any where else too go on this one

Even if there was such thing, I wouldn't trust it. Man still has less to lose.