Strange.... Here I've been, getting payed for my performances all these years, and I never knew I wasn't a professional keyboard player. I must have some VERY charitable neighbors!
That isn't to say that every single one of the styles I use hasn't been 'tweaked'. But I happily confess that NOT ONE SINGLE style I use was completely created by me. And, despite your insulting reference, Genysis, I can confidently state that 99% of ALL the arranger players here that make a living do not make their own styles. I'm sure labeling yourself as a 'professional' just because you make SOME of your own styles makes you feel better about yourself, but in the real world (you know, the one where you could make a living on a Radio Shack arranger!), NONE of us feel any less professional because we use the amazingly good styles available in the TOTL arrangers.
The style itself is only the beginning of a professional show, but I for one would rather be backed by great styles that I didn't create than half-assed ones I did... And you know what....? You are right! My audience DOESN'T care.
The purpose of an arranger is to fill in for the lack of a complete band. And just like that 'real' band, you don't expect to have to play (or teach) every last note to each and every sideman you have (not if you are paying them!). As long as they play inspiringly, you don't care WHAT they play (as long as it fits). But when they play badly, out of tune, lackluster, boring...... They got to go!
So who would you rather hire, Genesys...?
Once again, loads of noise from people that don't own one, but not one single OWNER chiming in and going 'yes, this is the greatest thing since sliced bread, and here are some examples....' Seems like, as long as the 'potential' isn't spoiled by actual 'reality', this is a great arranger!
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An arranger is just a tool. What matters is what you build with it..!