I think the only reason you say that is because people dont play the piano like they used to any more to get the church going. Many new players cant play on that level. Aint nothing like that octave style piano either. 
YEEES SAAAHHHH DOC!!! AND THATS A RAPP!!! Bishop Cole
Not so fast there! It ain't a rapp yet!!!!!! 
(I've always wanted to do that!!!!!!

)
It's generally common knowledge that if the Organist and Keys Player are around the same skill level:
The Organist leads on shouts and High Praise moments,
and the Keyboard player leads for the majority of the service.
It's not about "Which instrument is better", it's about what's the most appropriate sound for a particular scenario.
The Organ is Best for Shout Music.
The Keyboard should take the lead in 95% of the Praise & Worship songs/Special Selections.
(I play both, so I'm not prejudiced!)