I forget where I read it, but I recall reading several times that this was how people at Apple had to present stuff to Steve Jobs to get him onboard with it. He'd initially dismiss it, then come back with the exact same idea as if it were his own.
EDIT: According to this URL, it was from the Isaacson biography: https://www.nhbr.com/emulate-steve-jobs-with-your-eyes-open/