As for something being professional or not, here where I am from (also in many other parts of the planet) many people use their arrangers professionally and they make some serious money, which is the definition of being professional. Many of them use less expensive keyboards than Genos, Tyros, or even PSR. I know I use cheap and brilliant E-A7 among many other keyboards for professional work, also I remember using that garbage of a Korg PA-50 for one contract on board of a cruise ship, very successfully, and very professionally. So I do not believe Yamaha people think their arrangers are not for professionals, first of all it is very subjective, also they did some outstanding work when it comes to sampling and creating styles for their arrangers I doubt it is all in vain. After all, it is not important if you use Genos professionally or not, you paid for a FLAGSHIP (as they call it) arranger, so gentlemen give us what we paid for.
The major reason behind this asinine OS solutions and limitation, in my opinion is simply the fact that they sell packs, and this brings them some serious amount of money. Also, most Yamaha users do not use anything else than factory stuff, they in most cases do not create styles or sounds, even less do some creative work for arrangers and that is why they are satisfied with their keyboards, even more they look at you with eyes wide open wondering why do you need DSP effects in Genos. Or registrations for example. I found here some people who never used registrations, only Yamaha's OTS. Very difficult to accept as a fact...
And it is not illogical because Yamaha styles and sounds are great really. Not that they can not be better, oh they can, but comparing out of the box Yamaha with Korg is simply laughable. Roland do not have some serious arranger now, so I will not compare it.
I work with all brands for many years, Yamaha as well but now I have plan to work more for Yamaha which I did not want earlier because I knew it is very closed system with so many limitations. Now I find new problem every day, but again I am thinking it is maybe just me used to great and powerful Korg and Roland editing, maybe Yamaha is OK just I need to reset my brain. Unfortunately this is not true, Yamaha really has very strange solutions and limitations.
Someone will say, OK I do not want to make anything just want to play, and in this case it is much better but still, there is no way to lock BALANCE slider so when you change registration balance gets back to its memorized location. So if I need in club A for STYLE to be 110, but in club B I want STYLE to be 95 there is no way to do it.
Then all those sliders and knobs, they did not use motorized sliders, also they used knobs with hard ends, so when you leave the knob or the slider to some position, change registration and touch knob that was left at 98% position, everything goes BOOM. And then there is PSR with their two LIVE CONTROL knobs to regulate balance, so you touch them they reset everything to 100. I believe Yamaha employed some crazy guy to make this, there is no other explanation.
Oh, and what about that YEM problem when you import more than one protected pack from the same vendor, the keyboard mixes all samples so when you play drums you hear bass guitar, and vice versa?
I tried to contact them about this multiple times, but still nothing two years after. And the list just goes on, and on...