i've played piano/key from age 6 ... just turned 60 ... ( trumpet at 8 , gtr at 12 , bass at 13 , etc , etc )
most classically trained pianists couldn't / wouldn't do the job ... they don't know how to 'jam' , they just Read ..!
i switched to theory and jazz studies after 10 years of classical ... which helped me learned how to improvise and ' play by ear ' ...
for me , getting the right 'sounds' and 'signature parts' for songs was the Fun part ...!!! because just playing chords is easy enough for any chimp ..!!
but long ago i decided whatever instrument or genre i played , it was going to sound like ME when i played whatever ..!! i have my own style , keys or bass ... yes i'll get 'those parts' , but the rest will be me .!
if you want a robot , then go home , get on your computer, and program those parts ..!
you need to be clear right up front with what you expect ..! which would be no problem for me at all ..
and yes , a large percentage of keyboard players really just don't understand the job of playing in a band , and playing nice with others ..! in my case , when i did start playing keys/bass with others it was in 'pit orchestras' or ' stage band ' stuff , where there was still sheet music and a Director to follow ..?!
being able to play 'exact parts ' , then solo freely does take more than average skills ..!
and the opposite is true with those players ( B3 ) that just play organ ' by ear ' ... they just jam ... and rarely wanna learn how to program keys to get the right sounds , or they can't read music/charts/chords , or they don't play piano ..! regardless of what your might think ... playing piano / organ / synths are quite different ..! kinda like assuming all guitars players are also good bass players .. !??
and Yes ... our keys are costly , usually heavy , and a bit delicate to move ... and a pita to setup/tear down multi key midi'd rigs ... which there is rarely stage room for . ! that's why i gave up on the real B3/Leslie about 35+ years ago .. !
happy hunting .. !