I understand the concept, but like you're adding to the number of places where people have teams, increasing interest in those large markets, which is going to translate to increased media rights to pay those teams shares -- especially as Sports is more valuable in our a la cart, stream/binge society.
There's 18 markets with over 50 million people that don't have NBA teams where an NBA team would probably work. Cross off anyone with a question of "close enough to a team" or "market saturation"-- Tampa Bay, Riverside/Inland Empire, Baltimore, Hartford, Austin, Cincinnati, Nashville, Raleigh, Jacksonville, and Providence.
But that still leaves Seattle, Las Vegas, Montreal, San Diego, St. Louis, Pittsburgh, Vancouver, Kansas City, Virginia Beach or Raleigh, Louisville.
The smallest places on that list are like places you think of first with "what places really love basketball?"