Fully agree with the OP. Ironically, I recall seeing pics of bands playing arenas in the US back in the 70's .... Aerosmith, Led Zeppelin etc, and always thought they looked great. Was quite envious then.
Realistically, as the OP says, they are absolutely soulless. And I don't see the point in paying £daft to be so far from the stage, that you watch most all the gig on the screens at the side of said stage.
The Manc Arena/Nynex/whatever you wish to call it is even worse than most, as the acoustics are notoriously shocking unless front centre.
It would take something like my beloved Cheap Trick supported by Prince, Led Zeppelin and Jeff Buckley to get me back into one. ;-)