Counterpoint: I fact checked and corrected an article - the original article author misread the cited source and claimed statistics that were plausible but incorrect. In the process I improved the readability of the paragraph I touched up. My change was never reverted, and it was within the last year on a page related to slavery and human trafficking - so not exactly fringe, and subject to lots of eyeballs.

I would not be surprised if a lot of the people carrying forward the “Wikipedia is uneditable” meme have not even tried to edit Wikipedia at this point.