That is an overly broad generalisation. Where I live, golf courses aren’t irrigated at all - they just rely on rainwater, like every other farm does.

One of the golf courses near me has tee times for $10. I do not consider that something that only “serves the wealthy”. They also periodically close the course and open it up for RC plane enthusiasts.

Another one you can easily go for a walk in - I often do. It is effectively a public space.