I hate to point this out, but an arranger can turn everything off except the piano sound, and there you are! I’ve been using arranges as my live, gigging keyboards with bands for well over 30 years. To be honest, I find most arranger sound sets better balanced, and more practical for gigging than many a workstation with its emphasis on weird synthesizer sounds, and stuff you will never use in a million years.…!

Especially if you get one with a 76 note action, you can play full piano, or Roads, etc. in a band, and nobody will be the wiser for what else it can do…!
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An arranger is just a tool. What matters is what you build with it..!