Yup it can be updated and corrected by just about anybody...
preferably updated and corrected by "somebody" who is knowledgeable on the topic at hand, has the learning to do so, and the necessary answers...
Not just updated by "anybody" writing god knows what ..
Otherwise we then have an unreliable mess made by "anybody" ...
to rely upon for proper information.
Then that would not be helpful...
It would be terribly damaging.

All that being said...
"Anybody" being able to update or put entries into the wiki ...
even "Somebody" who has is knowledgeable and has a clue...doing the same...
Then why do we have..on the whole... an outdated wiki at all?

I defer back to my original statement ...
We do not have the devoted knowledgeable staffing or enough knowledgeable forum members willing to do time for forum management to upkeep even a public - accessible and public - alterable wiki.
I STILL rest my case on the issue of not enough numbers of folks here for the critical mass necessary to run the place as it used to be run.
The facts don't change.