As for the video, as we can see & hear, the drum kit is digital, so the only part which may sound different from an arranger is the bass guitar.

I tried to play with a semi-professional band and I didn’t really enjoyed that.

If we compare playing an arranger to playing with a perfect band which is in perfect conditions, surely, the band will be much more superior. But in a lot of real-life situations, sorry to say, PSR’a saxophone, piano or classical guitar would sound more “authentic” than real things. People have their “images” of how instruments should sound like based on listening to studio recordings, and when they deal with the reality it’s often not quite the same. In the same time, Yamaha, for example, recreates the very “studio” sound of those instruments.

It’s true that people would rather pay big $$$ to listen (or rather to watch) a real band; and there’s no much use of an arranger in a studio working on something which also involves a lot of $$$, but my point is that not always a band of decent musicians sounds better than an arranger.

Also, I keep in mind that each sound and style in my Yamaha is made by real people, and I always admire how professional, intelligent and tasteful they are. I must say, that in “intro” part of most styles there’s so much idea, so much essence of the genre that it’s really hard to compete with that (that’s why I only use short ones).

Surely we tend to polarize things for the sake of the conversation. There’s no real limitation on using it all, and the choice is often made by a specific conditions and demands we are dealing with right now, not because of some ideology.