You could equally well say “I find obvious errors in textbooks / lecture videos / journal articles / paper encyclopedias / ... all the time but it’s too hard to contact the author so I don’t do anything about it”.
The main difference is that in Wikipedia you can do something about it with some extra effort. So it’s actually a much better situation than most kinds of resources.
The pages that are “locked” are usually locked because they are spam magnets. Not allowing IP edits is unfortunate (and does discourage simple corrections to articles), but in the highest traffic parts of the site the work saved from not having to revert dozens of low-effort vandal posts is (at least arguably) worth the downside.
> overruled by partisan
You wouldn’t believe the amount of abject nonsense and spam that gets cleaned up by those “partisans”. But Wikipedia is an open project, the “partisans” here are just other (slightly more experienced) volunteers not in any way fundamentally different from yourself, and if you can convincingly prove your case via polite conversation you will win the argument (if there is a local dispute it’s generally possible to get more eyeballs on it by escalating to a broader group of volunteers).
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P.S. someone named Slartibartfast turning down a chance to work on the real-life Hitchhiker’s Guide?