What makes you think that there would be no fans? There would still be fans, just like there were before the NFL was around. I mean, that's what I'm trying to tell you. There is still the College game. There is football all around you and apparently, you don't pay attention to it. But because there were owners who invested in the League, you know have a product to watch. The Pro Athletes are on TV because these owners invested. They are making money, big money because of these investments. If that went away, there still be football, there just wouldn't be a lucrative avenue with which to get paid for it.
Bottom line, if your argument is that the Pro Game is what is important to you, as a fan, then you should be 100% in line with the idea that players should not get paid more, simply because they are players. You say supply and demand but do you really understand that concept? If you do, then why do you not subscribe to the market determining value of any given player? I mean, that is the very basis of supply and demand. If you allowed players to simply get paid more because they play, then you basically lay the foundation for failure of the entire league. All that would happen is that all players salaries would simply escalate to the point of none profitability and the league would eventually fail, out of hand. That is not a sound method to base players salaries on.