You want the real answer? It's because cis men don't earn their manhood. It's just given to them and no matter how they behave it's never truly taken away. Sure, they are still policed... but it's never to the point of removing their name and correct pronouns.
However if you are a trans man, little things can take away the manhood you likely paid money and invested time in to earn.
It's easier to misbehave when you're born into something. Of course a rich nepo baby is going to speed on the highway and not think much of it when he gets a ticket than a working man who isn't in the same position.