Austin, if the piano is the mother,or source of all western music, then knowing well the piano might help to learn every other instrument. Ofcourse every instrument has its own technical skills needed to play it. The sad thing is you can find a lot of music theory for piano, guitar, violin, , but not on the banjo. But reading piano music theory helps a lot to learn the generic music theory which can be applicable to the banjo.
You're absolutely right. There isn't really a ton of music theory for banjo. But playing banjo did help me a lot in learning guitar and mandolin. So I guess Foggy Mountain Breakdown transfers over as well!