The reality is that it is hard to find block themes. I've been asked at least a couple dozen times by various users (and readers while I was writing here for the Tavern) in the last several months where to find block themes other than Twenty Twenty-Two. Based on discussions with others on different Make teams, this seems to be a common issue.

The push to add a link to a separate page is about solving that easily-solvable problem. And, it's possible to do that in a way that adds context for users who happen to stumble upon that page (e.g., explain how these themes are different).

Are there other problems that need solving? Absolutely, but those should not be blockers for addressing an issue that could be solved inside of a day.