BGLI...I am right there with you. Well said. I will never reach the level I need to determine actual grading levels, or some of the technical details that professionals see, or folks here on CC that have been at it for a long time. Too old. Not enough time. That's why there is CC.

Training/Experience is key.
But your point on the grading, such 66/67/68 coins that command much larger premiums than if my coin presented here, were graded as a AU55/58. Technically, that is probably what would happen grading wise.
But as you also noted, having this for $54 in your collection as I do, is all that matters. Truly, in hand it is absolutely stunning. Crisp. Sharp. I don't see any defects as I hold it. I just see a deep multi iridescent colored silver coin, with a fantastic design, cartwheel luster, and eye appeal off the charts. It would be a shame to be graded so low. But that's the way it goes when looked at professionally as they have an obligation to conform to established Standards.
NOW...I will tell you one of my major frustrations....is seeing a Stone Mountain 50c coin (or any coin) graded a MS68, as there are only a hand full, and sold in the low to high $20,000 range. Then compare my sample to them side by side in HD pictures (which I did), and the differences ever so slight, but my sample would be graded AU55/58. Worth about what I paid for it...$50 to $60. Yup. I just don't get it sometimes. But in reality I do get it, and have to defer to the Pro's, and go with it.
And, there is always the favoritism angle that can rear its ugly head, where some 'extra' consideration may be given for a coin(s) due to the 'important' client they belong to. Just sayin. Though
TPG's are 'supposed' to not know who the coin belongs to, in order to avoid this from happening. But that would never take place...right?
I noted in another thread that I have seen MS67's that I could not understand. Looked way worse than a lower graded similar sample. Then a AU55 that looks better than the MS samples I compared to, and so on. I just don't understand it at times, but again...there are things we don't see, that the Pro's do, and they grade to those Standards that are established.
But we can never ignore, nor deny......THE HUMAN FACTOR. Oh yea. These
TPG's are human. And they very well could take as an example...my Stone Mountain coin...look at it for a grade, and see that off the chart eye appeal, and sway them to maybe 'waive' some small otherwise disqualifying imperfections, and grade that bad boy a very high MS grade, just because it screams "look at me!! I am the bomb!!" Lol
Hey, and that coin gets slabbed at a MS-67+. Some may cry foul! I know it has to happen (does not mean it should) because I have looked at so many coin comparisons, and though not a Pro by any measure....there is an element of common sense, and I can see that a particular coin I am looking at, may not technically be near flawless, but the eye appeal overrides it all. The HUMAN Factor. It absolutely plays a part. It does in all things in life. Yes sir. Some may or will disagree. That's ok. I may not have coin experience in droves, but I have life experience, and it applies here in many cases.
Another angle/question...We as buyers of coins? Why do PCGS Stone Mountain 50C MS-68 graded coins command $20,000+...and the same coin graded by NGC at MS-68, only commands $5000? Same Standards. Pro graded. They all look similar. Yet a $15,000+ difference a buyer is willing to pay for a PCGS vs NGC graded coin (at least for this coin type). The same coin. The same grade. We humans can be strange. But that's the way it is. PCGS has somehow established their grading prowess as the industry bomb! What's their secret? NGC is a perfectly professional and established grading company. Go figure.
However...having said all that, I will say this...it is probably prudent to not use the human factor reason to send coins into
TPG's based solely on it looks good, so the technical won't matter. You/We will more than likely go broke with that method. Lol. We have our frustrations, complaints, opinions, etc., but at the end of the day (hate that phrase), more times than not, our coins will get properly graded on merit, and not emotion (eye appeal overriding established Standards). Anything different would be the exception and not the rule. So, CC is the place to come to get that consensus needed on any particular coin. Or your local established Coin Dealer. Your wallet will thank you.

Ultimately....grading be damned. Just collect these fine pieces of history and enjoy it. The hunt is a blast as well. Enjoy. Ok...I need to cut the coffee.

Lol. Rambling again. Take care.