If I take this up in good faith, there are many valid psychoacoustic explanations for this phenomenon. I'm copying this from something I wrote in an old thread:
"I learnt a lot from
this talk on spatial audio by Francis Rumsey (on youtube). In it, he explains why two-channel stereo usually has an inherent artificiality compared to real instruments.
This is how reflections behave given a real stage - if there were actually real instruments at the artificial stereo stage (screenshots from the video):
Each instrument creates reflections, also the instruments in the middle of the soundstage.
But with two speakers, this is what happens:
The instruments between the speakers don't create any reflections. Because of this, two-channel stereo usually doesn't feel "real" to me - and this is supported by some psychoacoustical research into spatial audio.
My experience has been that (good) omnis and (good) dipoles feel less "artificial" than other speaker designs. I suspect the reason is that reflections from the room are coming from many more directions than with conventional speakers, and that this mimics how real instruments behave in a real room."
This is not "magic". It's about the interaction between the speaker and the room. It's not voodoo, it's something that has been described by several researchers. Yes, you can argue that omnis are a bad solution, but there is a real debate to be had here.