Hello.
Why do you say that?
Do you have some experience with this type of arranger?
I have Yamaha Genos, Ketron Audya, SD9, Korg Pa3x as well I also had for a month the Pa5x which was provided to me by a well-known music store in order to test it in order to give an exposure to the store's salespeople.
In fact, I had also made a video (with Pa5x) which I am attaching to you but it is in the Greek language because it was addressed there and that is the reason I did not have it public but as (unregistered).
Take a look at it if you want.
https://youtu.be/oke6zdkrbZE?t=41

So I think I know very well the pros and cons of all of them.
Therefore my question to you is if you have ever had experience with these types of instruments to have this opinion (about a fake) which of course I absolutely respect although I don't agree.
Also I would like you to tell me what exactly you mean by (cheating).
I would like your answer to this and then I will give you my opinion if you want.