I see what you mean, but I think you have misconstrued what those posts are. Rather than a love of OGC, I think it's the love of the accessability to OGC, not something good/bad about OGL.
As you say, Paizo couldn't make OGC to be non-OGC, but I don't they'd want to. WotC had an SRD for 3.5, however they made the progression tables to be non-OGC. WotC limited OGC to some classes, not all - look at all the various splats and Complete books for example. Why weren't these OGC as well.
Paizo chose to make their progression tables part of the OGC, so that all the rules are OGC. Paizo's OGC rules are not limited to Core. The APG, GMG, UC, UM are all open content. Paizo could have limited the Core itself to be OGC, then chosen to make all subsequent books non-OGC. They did not, so any perceptions that Paizo wanted to limit access to their rules because of the nature of OGC is simply not so.
I'm glad for the existence of OGC, and the accessability it provides, beyond that I don't see it as a good/bad thing in of itself, rather good in the accessability to it.