Genuine question (please feel free to interact with this post)

Why are “NBA” fans/media the only people in sports that bring team market size into question. I’ve seen so many say “an okc-Indiana matchup of small market teams is gonna be the least viewed finals ever” and other things like that. You don’t see that in like the NFL, NHL, or MLB. Why is it that big of a deal for the NBA?? IMO if you are a true basketball fan, that series is gonna be a terrific series.