This makes sense. I guess it's aimed at "integrating" Omni with your h/w synth.They've set it up not to have Omnisphere emulate the hardware, but behave predictably based on it, using similar waveforms, effects, filters etc from the source synth, and give it a flavour of the source synth. There's nothing to stop you using additional features in Omni, features the controlling synth doesn't have physical controls for, and you can always use these as a starting point and develop further.
And it doesn't mean you shouldn't use the hardware as a synth in it's own right either, or "replace" it with Omni - this is an additional feature that, if you use Omnisphere, now gives you something you couldn't easily do before to make your Omni experience nicer and more immediate.
It's about combining the good, predictable, physical control of dedicated hardware control surface to the advantages of software.
I was thinking more in terms of Omnisphere being it's own thing (which doesn't really have a lot to do with a Prophet or Voyager etc)
Anway, I know the problem is that *I* don't get it - rather than it not being a good idea
