That's not how I read it. I didn't look closely until
Gotham Gator pointed it out, but the notes indicate that "team values do not include stadiums or real estate." That applies to the team value, not to revenue or net operating income (or the operating costs used to calculate net income).
For that they used EBITDA ("operating income represents earnings before interest, taxes, depreciation and amortization"), which leads to some anomalous things, like counting rent as an expense if you don't own your stadium but ignoring depreciation if you do own. This means you are not even getting the benefit of any sort of like to like comparison with their operating income figures. Also differences in taxes paid in various taxing jurisdictions is ignored and we pretend the taxes in California, NY and New Jersey are not higher than most other locations, and also ignore any special tax deals individual clubs might have.