If an user unknowingly or not use or add the wrongs tags, isn't the community task to correct them (I mean the tags, through if the user ask for guidance it's cool for me too, everyone loves to teach, no :D)?

Found a post in Meta.SE that seems to agree with this position:

Extraneous tags should be removed, improper tags should be removed, and "meta" tags should be removed. (emphasis mine)

Is this guidance wrong? Or should be interpreted differently (seems pretty straightforward and explicit)? I'm hurting the site when I re-tag a (unanswered) question?