It's great to learn piano, anytime in your life.
After started on piano when I was 5, it has helped me with writing, arranging, doubling (I played yamaha DX7 and tenor sax in the band "Wize Guys"1985), Jamming, or just playing for fun.
My dad was a B3 Player and my mom is still a piano teacher after 50 years!
Every Musician should know how to play piano.
The piano is the foundation for the study of Jazz harmony.
Please listen to Bill Evans piano changes, or Herbie Hancock's comping! Unreal!!
(also don't forget the guitar approach to harmony)
The greatest Jazz piano soloist's?? IMHO... Art Tatum, Oscar Peterson, Monk, Bud Powell, Ellington, Barry Harris, Mccoy Tyner, Herbie Hancock, Benny Green, Fats Waller, Walter Bishop JR, George Shearing, Duke Pearson, Sonny Clark, Keith Jarrett, Wynton Kelly, Chick Corea, James Williams,...
and so many more!!