The same way most management gets their job. Incompetence. They cannot sack them, so they promote them into a position where they can do less actual harm.
This & the fact they couldn't give a monkeys about the staff they are responsible for, they think they are always right.
This 'joke' sums management up to a tee.
A man in a hot air balloon realized he was lost. He reduced his altitude
and spotted a woman below. He descended a bit more and shouted, "Excuse me,
can you help me? I promised a friend I would meet him an hour ago, but I don't know where I am."
The woman below replied, "You're in a hot air balloon hovering approximately 30 feet above the ground.
You're between 40 and 45 degrees north latitude and between 59 and 60 degrees west longitude."
"You must be in Engineering," said the balloonist.
"I am," replied the woman, "How did you know?"
"Well," answered the balloonist, "everything you told me is technically correct, but I've no idea what to make of your information, and the fact is I'm still lost.
Frankly, you've not been much help at all. If anything, you've delayed my trip."
The woman below responded, "You must be in Management."
"I am," replied the balloonist, "but how did you know?"
''Well", said the woman, "you don't know where you are or where you're going.
You have risen to where you are due to a large quantity of hot air. You made a promise,
which you've no idea how to keep; and you expect people beneath you to solve your problems.
The fact is you are in exactly the same position you were in before we met, but now, somehow, it's my fault."