And why did it get on the social media circuit in the first place when Arkane games didn't? Because it was good enough to be there.
And why did the friends start playing it in the first place? Because it was good enough.
Dark Souls never sold as much. Elden Ring did. Because it was good enough to do so and built upon years of work.
As I said, if the game is good enough, it will sell. Games don't necessarily have to appeal to casuals in order to sell, as we have seen numerous times.
Redfall is apparently releasing next year. You won't see it in any "most-games sold charts" because people would rather buy Hogwart's Legacy, Horizon Burning Shores, Jedi Survivor, Final Fantasy XVI, etc, because those games honestly look much better and more appealing than Redfall.
That has been the issue with most Arkane games. They've good games, but there were always better games out there for consumers to buy. And because consumers have limited money, the best games chart, while average games don't. It's survival of the fittest, as I said.