"Oh, and one last thing, let's take those darn built-in microphones off the arrangers, it tempts to many awful singers to try it. "

Chas,
I may be awful, but I'm the only singer in my one-man-band! The built-in mic keeps me from lugging extra gear around. Sometimes I have two or three appearances the same day, and every little bit of weight and time adds up.
And, unless you are doing all your own songs,(and there's a HUGE market for that), we all are playing someone else's music.
In years past I made most of my own styles from scratch, but that's no longer necessary, although I edit a lot of them.
I found out years ago that I could play with a band, have a good time and bring home enough money to cover expenses, or I could do it all myself and bring home enough to live on. Before arrangers it was necessary to use a drum machine, maybe kick bass pedals, stack a few synths and modules. Now it is much easier thanks to arrangers.
You may very well be right about the average playing ability of participants on workstation forums. What might be interesting to compare is income made from playing music live. I wonder how many have achieved level of professionalism that allows them to live off their musical ability. I'm not being sarcastic, I think this would be interesting to know.
There are most surely several ranges of arranger enthusiasts here, ranging from rank beginners to seasoned pros. We all seem to get along very well most of the time. I'll bet there are more arguments in the average family than there are on this forum. If we were all alike, it would be pretty boring.
Anyway, I'm not a Tyros 2 fan either, although I've tried hard to be. I just can't get around the drum sounds, after hearing Ketron's.
As for the Nursing Homes, I get more pleasure and satisfaction from performing for the old people (that's anybody older than I am!) than anything else I do. Plus, it keeps me from having to get a real job! It's a no-lose situation--you bring joy to a room full of people, many of whom don't get much joy, AND you get a handful of money to boot. But the nicest part yet is that they truly appreciate you.
One other thought, I probably have replaced a third of the styles in my SD1, and don't use another third of the ones that are left. But it's nice to have some of those tired old things on there when someone plops down a hundred and requests "Never On Sunday" or some such smaltz! Hit that Cha-cha button and smile all the way to the bank.
Anyway, we can't disagree with a lot of what you said, but there is always another side and another perspective.
Far from ruining my evening, you've made me stop and appreciate the fact that I've been given the gift of music, and have been lucky enough to do it well enough to share with others.
Peace to you also!
DonM