I feel all should have a touch of piano regardless of what instrument they play. Years ago if you wanted to go to college and major in music you had to take some piano lessons along with your selected instrument.
Their reason: When it is time to learn music theory you can see it on the piano, not so on other instruments.

The piano is the master instrument, it can represent all the instruments in the orchestra, it is why people who arrange for larger groups select piano.

If you are playing by ear, and that has it’s own beauty, the above is just conversation.

John C.