I would understand why people assumed the show called "Queen's Gambit" would be ALL about chess. But you see, chess players are only a small population and some of them might not have access to Netflix or even a device. They needed more than just chess players to watch it, so they added extra elements to it. That's why a lot of non-chess players and celebs are watching it now.
You are overlooking that the series is based on, and pretty faithful to, a novel. It was never intended to be all about chess, nor were the non-chess parts added on.



I remember there being a blog talking about this
link?
This wasn't the exact one, but i found this one:
https://www.chess.com/blog/ppandachess/spoiler-alert-unrealistic-chess-details-i-noticed-in-the-miniseries-the-queens-gambit
Only one I disagree with is:
Beth losing all games to Benny at speed chess but them beating him and other top players SIMULTANEOUSLY shortly after, on the next episode.