Yes, opinions fit in GD quite nicely, as in witnessing threads. That’s not the problem though is it? Someone makes a very minor mistake and you try to hijack a thread over it.
If you point out the facts that demonstrate that the opinion is false, you will draw no notice from the Mods.
If you make a personal attack on a poster because your opinion of what is a fact differs from theirs, you will draw the attention of the Mods. if you then make an issue of launching repeated personal attacks against posters because your opinion of what is a fact differs from theirs, you will be guilty of hijacking the thread, which will garner Mod attention.
Honestly, people here make mistakes. We accept that and, if it’s really necessary, we respond with something polite like, "you mean Seattle not Tacoma, right?
We’re not ganging up on you, instead, we’re trying to get you to see that there were mistakes made and helping you avoid them in the future.
In this case, move along please. Just how much attention do you feel one instance of misspeaking requires? Declare victory and be done with it. Build a fire, coat your naked body in deer fat, beat a drum, and scream your victory to the skies.
ETA: Oh dear, I see you were pointing to a typo. Otherwise known, I guess, as an opinion or false information. You got me! More deer fat.