Yes, court time can be a scarce resource.
What I don't understand is why some folks think they have a greater right to the resource and can just evict others?
Do you think you can decide that someone is hogging a sweet parking spot? A shaded picnic table? A prime spot on the beach? Oh, you're entitled because you pay taxes? Well, so do I.
Look. Government can set time limits. Parking meters are a good example. Metered parking is a first come first served fee-based allocation system for a scarce resource. It works if and only if there is aggressive enforcement.
Since there can be no aggressive enforcement at public tennis courts, it is dumb to have time limits. It would work as well as metered parking without "meter maids".
If you work and want to play tennis and cannot get to the courts first, best join a Club.
-- Random Error Generator, Version 4.0
-- Master Moonballer