Aaah, the rockstar developer. The asshole feared by all sysadmin department. The fucker that pushes untested shit to production on Friday afternoon before disappearing off the grid. The son of a bitch that, while everyone is scrambling to restore production to be stable in between Friday and Saturday morning, is enjoying is life? The one that everyone knows would have been better if his mother swallowed that night, that on Monday morning is surprised and enraged that all his accounts are locked out?
That rockstar developer?
Sorry, got some issues with that living stain of shit.
Some devs consider themselves rockstars or 10x devs, people who are just more talented at computer development. Yes, I've heard both those terms both from people referring to themselves and from management saying someone is talented.
This attitude leads to deploying code that is unsafe/breaks conventions (I know better), untested (it'll work!), poorly documented (It's obvious! If you don't know what it does, maybe you shouldn't be touching it), and generally causes problems for everyone around them.
These people typically end up owning product by themselves, which to management can look like they're doing the work of a whole team, and a form of containment for anyone who has had to work with them.