The reasoning as to why the franchise gain in value was flawed to begin with. It's not because there's buyers entering a bidding war for a limited supply, it's because professional leagues generate a ton of money, whether it's by operating income from teams, TV deals, merchandising, you name it. Franchises wouldn't gain value if the fundamentals behind their value weren't solid.
Your initial post wasn't necessarily ambiguous, it was just misleading.
Also, you can't just say buying a team is a poor investment on a P&L basis, because it's essentially irrelevant. Or else you might as well say real estate investments aren't good because hey, their return on invested capital is low!
It may be true in a way, but it doesn't make it any less irrelevant.