Hmm, interesting. I feel like many people who play these sports games play them, because they're familiar with the real sport. To them, it's an easier entry into the video game medium, as they just need to learn the controls, not also the rules.
But as a result, they tend to only play one specific sport game (for their favorite sport) and not that many other games. Keeping Game Pass for the whole year for one game, is definitely not worth it. For 2+ games, I guess, technically, but it certainly doesn't have the same bang-for-your-buck.
So, yeah, I hope they know better what they're doing than my armchair expertise, but I certainly find it surprising that they didn't diversify elsewhere...