I'm not sure taxpayers are covering all the costs. When I was a kid I used to golf at a golf course that was owned by the county. You still had to pay to play there. People that don't play golf pay very little for the course to exist, but they are still paying something.

Maybe this is "robbery" (which is not what that word means), but you still get the benefits of living near open space (no car-owners living there, trees turning CO2 into oxygen, bees pollinating your flowers), etc. All in all, it doesn't seem too bad. (It is $26 a round, btw.)

Research universities fill a similar role. They are good to have around, even if you can't monetize their research for free. There are other benefits.