One thing you'll find ANY real artist willing to say, whether they are 'technically' proficient or not, is that they are ALWAYS willing to grow, to learn new stuff, to not go around and say that 'this is all I need to know'...
Which, from the post of a FEW here, is EXACTLY what they are saying. 'Why should I learn any traditional techniques, if my arranger already does it for me?'
That, folks, is the path to stagnation. Sure, buy a new arranger, get a few new styles, and you can SOUND like you've learned something, but that's the arranger, not you. What YOU are doing hasn't changed an iota. That may, indeed, be good enough for you. But trust me, NONE of the artists whose songs you are playing ever felt this way, and most of the PLAYERS here feel the same way.
If your goal is to put on a show with the minimum amount of effort and the least amount of shedding, well, there's always karaoke... And if your goal is to learn as little as possible to achieve the same result on an arranger, you can't exactly blame us poor musicians for pointing that out, now can you?
RH, LH, it makes little difference. The minute you stop and say 'I don't need to learn any more', you stagnate, even if your arranger moves on.
If your goal is this mythic 'the arranger does it all so I don't have to learn to play, and I can concentrate on entertaining my audience', well, that's certainly legitimate, and you certainly can have a perfectly good career . But getting indignant when it gets the inevitable response from a forum full of musicians (and only a few 'entertainers' with minimal keyboard skills) who realize that you are NOT 'cheating', only 'cheating yourself', kind of defeats the point, doesn't it?
You've already decided you don't care (by deciding NOT to try and learn to play), so why get indignant? There's PLENTY here who'll CLAIM they want to learn and grow, but oddly, will get defensive when perfectly reasonable advice is offered. Strange...
Anyhow... Anyone who has read this post and thinks that my saying 'You' is in any way directed at them personally has got it wrong. I am using the plural 'You' and it's meant as a general comment. It's hard for me to say "we' when I am definitely NOT in the 'I don't need to learn' camp! For as long as I have been playing, I have ALWAYS considered that, even if I CAN get technology to do it for me, I STILL need to learn how to do it for myself...
It's how you grow, it's how you don't get stale, it's how you prepare for whatever technology and the changing musical tastes of the public forces you to do NEXT... Let's face it, if there ever WERE a backlash from the public about listening to machines rather than humans, those of you that invest the time in learning traditional keyboard technique will still be working, and those that rely 100% on the arranger to do it for them will have problems. I'm not saying that's likely, but who knows where technology and the public is heading? Those that use their arranger to better their general skills will have options, and those that use them so the DON'T have to learn will have fewer...
Each of us needs to make that decision for ourselves. But, if you walk into a room full of doctors, and proudly announce that you are ready to operate on any of their kids, simply because you have a laptop and WebMD, well, you are likely to get the same response as you might round here announcing you 'don't need to learn' how to play well...