IMHO, the number of seats has become less and less important. One problem with that many seats is that you can always get one on the secondary market which drives down the original sale price. The theory of elasticity comes into play when deciding the prices. You aren't seeing the NFL building 100k-seat stadiums although they certainly could. Sofi is 70k, Benz is 72k, AT&T 80k, and NO is 83k. Browns are projecting 67k.
The real revenue is, of course, TV. Second to that are loges, food, booze, and parking. Around that is the weekend experience like hotels, restaurants, spas, meetngreets, etc. The guardians took the baseball field which once sold out for two seasons straight, and cut it down to 35,000. But they introduced these patios with automatic beer distributors where people can meet. It is quite a meat market. But if you want to take a gang of people, or have friends in another section, you can go there pay the bucks and enjoy the game. Great fan experience.
I think PSU has this love affair with over 100k but it is out of step with what is going on in sports in general.