You keep linking this article, but I don't think you read it. see how GTSport is WAAAY up at the top of the best selling GT's by units? and GT is WAAAY down at the bottom? And only 7 million units total for the whole series??? Geez, maybe you need to look at the bigger picture.
Here's the thing about stats, you need to dig into them and interpret them.
See, for instance, I can link the Canadian stats that show the price of GTSport was discounted for the holidays, but there was no price drop until April of 2018, a full 6 months post launch, which is in stark contrast to your statement about it being discounted by three months into its lifecycle.
https://psprices.com/region-ca/game/254820/gran-turismo-sport
And stats can be reported favourably.
For example. I bought the pack that has the download key for both PS4 and PS5. I figured I might need it someday when I get that PS5. So, that's a sale for both the PS4 (because it counts towards PS4 unit sales) and PS5 (again, unit sales). It also counts as a "full price" even though, when you look at it, it's actually a discount over both stand alone versions.
I won't be surprised to see these stats tracked in the manner that benefits the optics the most.
Not when your new console isn't available and the bulk of your audience still has the previous console, and either way, what does that have to do with this discussion?
People also don't necessarily know what they are getting into. TONS of people, on this very forum, are asking questions that amount to "WTF??? Where's the game they promised me"
It's like you just got your first job at Sony and they made you the community manager for GT or something...
...You are bad at it
Again, there's the promise and then there is the delivery. When GTSport released, EVERYONE considered is to be similar to prologue and it had no single player, which, even as a multiplayer guy, I found that to be a little strange. But, as we know now, they added content with time and I must say, it kept me going for years (I still haven't looked at the single player stuff they added though). It kept most of us going for years. So it under promised and over delivered
On the Flip side, GT7 promised to be a "return" to the old game. What we got was the ABSOLUTE SAME AI that we have all been complaining about for over a decade, the same single player as GTSport (and I feel this needs to be put into bold, because I don't think you get it,
THE SAME SINGLE PLAYER AS GTSPORT), grossly diminished/broken lobbies, basic features that have been removed (such as the ability to load ghost replays being, tracking your best lap times on the MFD, and more).
Now, you can go search through thread upon thread of how disappointing single player is in GT7, in GTSport, in GT6, and even in GT5 while you formulate your argument on how this is going to be the best selling GT of them all on the back of lacklustre single player and punishing microtransactions. Or, maybe the British are just strange people who like bad games.