What puzzles me is why so many people argue against the establishment of a bit or airspace when what really matters is the way in which it is managed. Sadly, after establishing a piece of airspace the CAA rarely, if ever, looks at whether all airspace users are being given equal opportunities to access said airspace.
I think the people who often argue against airspace do it for precisely the reason you give - it is they who do not get the equal access when there is no reason that they shouldn't.