This is, in general, a good idea. Nostalgia etc. and some kind of misguided paternalism causes us to “fund” sports when really all of this stuff should have to just pay for what it is. The market economy is a good way to allocate things so that you don’t end up with a $40k/yr income person paying taxes so that rich people get tennis courts in Russian Hill. We should probably just have market functions for most things.

The government doesn’t have to leave the sphere. It just has to manage the market. For instance, a specific amount of space in a park could be allocated to dynamically priced programming. This could be auctioned on an annual basis with teardown costs pre-allocated. Then you don’t have the argument over whether tennis or pickleball. It could be cricket or sepak takraw for all we know.

Proponents of various sports could group together to share the space. This is obviously far superior to the communist style committee allocation.

And obviously the government should not fund sports. Creating the environment where sports funding can occur by ensuring a framework for contracts and so on, yes. But actually deciding that baseball or football or basketball need to be played is patently ridiculous.