Dear Vert,
I infer by your above response that you are looking to poignantly call attention to the fact that earlier today you stated that an obstruction dot would drop a grade down to a 9, but were informed that this may not be the case.
In this installment of the Elite Fourum 
, the Spanish charizard enjoyer has stated that a card with a dot was graded a 9 possibly in part due to a dot. “Oh, the irony!” young Vert exclaimed. “This is what I stated earlier, but was informed I was incorrect!”
In the aforementioned printer obstruction thread, you also stated that all three grading companies were the same, and choosing one is a matter of personal preference. I regret to inform you that this is not the case, PSA, CGC, and BGS have different grading standards and may approach different defects/artifacts differently. That detracted from your aforementioned point that it would be dropped to a 9.
What I am taking as the moral of the story (s/o Aesop), is that making definitive statements, or answering questions in areas where you don’t have experience, isn’t necessarily helpful to the poster, and isn’t helpful to you as you learn.
While grading has objective criterion, they can be applied somewhat subjectively, and there may be consistent history to how one grading company typically treats certain characteristics (printer obstructions, silvering, etc).
Some of the most valuable members on this forum don’t post often, but when they do, it’s to learn, share an opinion, or contribute something factual where they have relevant experience from their collecting journey. Or post super dank memes. Posts read is as wonderful a metric as posts made.
With esteem,
William