Personally, I don't care about "note" tags, as well as "comment" tags.
I try to correct "fixme"s.
A similar thing for "source".
At the end, I agree with you that these are are useless tags, but I don't want to delete someone else work.
https://wiki.openstreetmap.org/wiki/Key:note
https://wiki.openstreetmap.org/wiki/Key:comment
Also, in Colombia, we are in an ambitious project to correct all political divisions. This project will correct tags like this, but this is going very slowly.