Transcription errors exist on all sites. These are common mistakes and are also compounded by the errors make by the Census Takers and even the person giving the information, add in the genealogist that perpetuate those mistakes and you have at least 4 people providing information and interpreting the Census. Most of the sites have the ablity to either edit or report the error. I do that freqently on Ancestry and FamilySearch. But, I aways look at the original if possible and corrobrate with other evidence if I can.
Transcription errors aside, the more destructive errors are those who create or change a profile for a large variety of reasons. Not using sound evidence based processes such as the Genealogical Proof Standard being one such example.
So, errors, mistakes, and outright fabrication exist on all publicly shared sites. Each site has it's own method for contacting the perpetrator or the site for "correction" but the degree to which they actually see and respond to your request varies greatly and is often ignored.
WikiTree has the best response rate of them all. But even if you can not get a PM to respond, WikiTree will. Anyone who has a genuine interest in correcting a WikiTree profile has several ways to get the change made. And if it is deemed appropriate per WikiTree policies, it will be changed.
I use WikiTree as my homebase. I do that for many reasons but one is that sharing a WikiTree URL is easy and anyone can see it with out having to be a member of WikiTree. Since I try to make my profiles as accurate as possible, WikiTree is where all my evidence and reasoning resides. Then, if I need to "correct" another site's profile I can just share my work via a WikiTree URL and include a short explaination.
Whiile I am currently exploring ways to provide WikiTree links on those sites in hopes of stablizing their profile changes, I hold no illusions that they will get corrected. Essentially I have given up "correcting" all the other sites save FamilySearch.
I have seen the same errors reoccuring in cycles no matter what approach I use. They get corrected and the error comes back. Interestingly however, I have also seen some significant changes happen on other sites after crafting well documented and well reasoned profiles on WikiTree. I am seeing this new "correct" information replacing those errors. It is kind of like that expression, "A lie gets halfway around the world before the truth has a chance to get its pants on." (Winston Churchill - Or did he?)
For me, FamilySearch is a Love / Hate relationship. They would have such huge potential if they understood how WikiTree handles a Single Family Tree. But they have been improving over the years, they just move slowly. Maybe with good reason. And after attending RootsTech 2023, I have caught wind of some changes heading our way to improve the back and forth battles that rage on their Family Tree. So I continue the battle there as there is still hope.