Lots of good comments here and I agree I've never seen an Arranger Player out there either. I use one because it allows me to sound bigger and more danceable. At the Jersey Shore I got introduced to all the acts using tracks. Solo's, dous, trios, etc.
I gave in and started using them too. I don't like it and even though I still plsy the keyboard parts I feel like a Kareoke singer.
I now use Styles, SMF, and DJ. As others have said people don't care how the music comes out as long as its good and you have good vocals.
Here in the South its Guitar land and people really don't relate to the keyboard. Just saw a duo last night. Guy strumming an acoustic and singing with his wife. They were borderline OK but thats the norm here.
I'm not doing the Johnny Lounge thing with the wireless mic and total canned music, its not me. So I guess I'll just hang on.