I think you misunderstand me. I meant "higher standard" as in, not sinking to the level of exploiting mechanics, etc. I see no reason why someone should have to "prove themselves" in Open if all they want to do is derive simple enjoyment playing the environment in Solo (or Group).
I get what you mean about Solo being "just different" and in a lot of cases it is. Particularly for people like me (and, it sounds, you) who are happy doing their own thing, aren't in a race to the top, don't engage in PP, etc - I don't see why my mode choice makes any different or that anyone should complain about the choice I make. In my mind, complaining about people playing in Solo because they aren't there in Open as cannon-fodder isn't a worthy argument.
Networking and mechanics aside though, surely you would concede that there is at least a perceived difference when it comes to situations where players are working towards (or against) a common game goal. PP and CGs being examples of these situations. It doesn't mean that either group has a right to exclude the other. But the fact that they both contribute to a common goal with a different set of rules could be viewed as slightly less than fair.
With your analogy, nobody should really care how people get up the hill. It's done for enjoyment. Doesn't affect you. Get over it. But if that was a competition where you started at the bottom and had to make your way to the top and back down again... feelings might change somewhat. Could you imagine CQC CTF if some of the players were allowed to play in a Solo version of CQC?!
Don't worry, I think we're on the same page really.
There may well be a perceived difference regarding PP's and CG's (neither of which am I that interested in). My perception however, is that while the perception that players in Solo have an advantage looks on the surface to have some merit, when one looks at the mechanics of the game, instancing for example, meaning other players in Open could very well be invisible to you too, and simply the fact that not only will there be players hidden from you working against your design, there will also be players working with you, hidden from the enemies that you are facing in Open. It balances I imagine, and FD will have numbers to determine if things get out of balance. So no, I think the whole 'fairness and balance' arguments are way out of proportion. Players in Open can (potentially, instancing allowing) counter other players in Open and have the fun that they are looking for, and players in Solo counter other players in Solo, happily fortifying or subverting, or whatever it is.
My analogy is not an analogy of a competition, and I just don't view ED to be that kind of direct competition. As Robert Maynard says in one of his posts, you set goals for yourself to achieve.
I believe a (very few) people have suggested that they'd like a Solo version of CQC. Personally, although I can understand where they are coming from, as they may want the 'fun' that CQC offers, but simply have no interest in PvP, I think CQC is set up to be directly competitive, CMDR vs CMDR, at least, that is how I understand it, so it's not likely for a Solo mode to emerge.