No worries. I find that in practice the kinds of questions that I can't answer for myself (the kinds for which a natural language question rather than a straight Google search for documentation is helpful) are almost always already answered anyway. So having it a read-only site is not a big deal.
I think their model does indeed turn away a lot of people with good experience and intentions, and even leaves a lot of incorrect cruft lying around, but overall it's a mostly-beneficial source of information, with, as you say, high searchability.