Maintaining that much turf probably isn’t very environmentally friendly, either.
Maybe the better way forward is for other versions of the game to increase in popularity. Obviously there’s mini golf/putt putt, but there’s also stuff like Top Golf (digitized driving range with almost a bowling-like game options using those sensors), all sorts of indoor golf simulators. If VR/AR gets better, we might see some of these other types of games become more practical replacements or spinoffs from the traditional outdoor game.