That occurred to me too, but I wonder if there's a way to caveat that the length descriptors refer to some threshold of player investment that expresses "You've experienced the basic gist of the game and a large majority of what the developer wanted to convey. You can move on to another game or continue to improve in this one, your pick."
As a player, I'd love such a classification. Increasingly I just don't have the time to slog through an entire Elden Ring or Starfield. Give me a way to easily find more Rocket Leagues and Cocoons.