My problem isn't that I dislike playing piano it's that I can't play piano! I sound like an amatuer. It's really a different instrument. It has a totally different feel (much heavier action), a totally different way to play it (the position of your hands) and a totally different history and expectations of playing than the organ.
I've never considered myself to be, for one instant, a pianist. I consider myself an organist because I've spent the last 8 years dedicated to the instrument. If I spent that on piano then I might be somewhere with it.
I have done jazz gigs on "piano" (meaning a synthesized piano/keyboard) and I hated them. I didn't know what to play. I actually prefer electric piano much more. I can't really explain why... maybe I'm just intimidated by the acoustic piano. I love Fender Rhodes, I love Wurlizter electric pianos and I love acoustic piano but my preference, if I couldn't play organ, would be electric over acoustic from a playing perspective, not necessarily my own listening perspective.
Jimmy Smith has been recorded on piano here and there. The latest example I can think of is a record from the 80s on Elektra called "Keep on Comin'" that has one track of Jimmy playing solo piano. He sounds good.
Larry Young's piano playing on the Cassadranite/Woody Shaw record sounds a little... I don't know... weak to me. Not from a musical standpoint, but from a technique standpoint. It physically takes a lot more hand strength to play piano than it does organ and it sounds like he's not quite there to me. But that might just be me.
And finally, to answer your last question, I don't think I would take a piano gig at this point. I just wouldn't feel comfortable playing and I feel like I would be a disservice to the music. It would be, frankly, embarassing. I am just not a pianist in any sense of the word. I can fake it here and there for my R&B band but that's the extent of it.
I consider myself like Groove Holmes. Groove was not one of those cats that started on piano and switched over. He was an organist from day one. There's nothing wrong with switching and maybe someday I'll take the time to get to know the piano better, but right now I have enough to learn with the organ to keep me busy for quite some time!