The bad manager cannot tell the difference, and usually ends up looking like an idiot to his director.
The problem with management types vs. individual contributors is that managers have more time in the org and usually have friends who can bail them out. So a bad worker will get fired, but a bad manager will get reassigned or even promoted.
The problem with management types vs. individual contributors is that managers have more time in the org and usually have friends who can bail them out. So a bad worker will get fired, but a bad manager will get reassigned or even promoted.