Do you literally not understand the first sentence of what he said? This is NOT just an investment for the Spurs, this is an investment for the entire downtown SA and the city so it doesn't become the likes of fucking Tulsa, Wichita, or OKC. Project Marvel encompasses the Alamodome, Convention Center, Court House, and land bridge which all have nothing to do with the Spurs, but a lot to do with much of the economic and tourist activity San Antonio currently sees and could see. Anybody that has visited San Antonio specifically because of some large event that occurred at all of these venues would know. This includes anything to do with Texas education and UIL (TMEA, high school basketball and football championships), DCI, Alamobowl, UTSA/UFL/XFL football, huge tours like Paul McCartney and Bad Bunny, and the NCAA Final Four. Speaking of, the NCAA have already said that San Antonio is no longer in consideration to host any future Final Fours specifically because of the aging Alamodome. Project Marvel is trying to fix that and also prevent any of these other major events from leaving town. Again, these items all have nothing to do with the Spurs and yet the Spurs are still willing to give $500 million towards this effort. You hardly ever see this from any other sports franchise so consider SA very lucky that they have the Spurs who are willing to contribute billions of their own money back into the community.
Also it's funny how you mention losing the Rodeo would be a big loss. Because the SA Stock Show and Rodeo are 100% on-board with Project Marvel. They actually want the Spurs to move out of Frost Bank Center so they can have more access and control of the entire area to do what they want year round. And if you like Fiesta, then an entire revitalization of that area of Hemisphere Park + Alamodome + Land Bridge would make Fiesta even better. Right now, the Fiesta carnival that happens in the parking lot of the Alamodome is off by itself while the whole grounds of the ITC and south of the convention center is completely dead.