Not for the reason you’re thinking. So that when your phone is close to dying and you‘re on a long walk you can vamp over the chord progression in your head.
sing the melody first, keep snapping, and then impersonate the band. i just went for like 34 minutes round and round. you will never be bored.
p.s. you don’t need to know theory to do this, clearly, there are a billion phenomenal “untrained” musicians. But piano being forced on me at 7 yesrs old was probably the best thing that has ever happened for my brain.
