As the idiom goes:
Jack of all trades, master of none.
But did you know this is only half of it. The full idiom is:
Jack of all trades, master of none, though often times better than a master of one.
Normally we only hear the first part, but the second half changes the sense completely.
People who like doing lots of things… you can now feel better about yourselves. As for the specialists…
Thank you to the person two rows back on the train who shared this in my ear-shot.