There are plenty of good golfers out there, the problem is that Tiger Woods and Phil Mickelson are the only ones with any real charisma that seem to be able to CONSISTENTLY PLAY WELL (and even the two of them have had their moments).
From a business/ratings standpoint, professional golf seemed to reach the peak of its popularity back in the late 1990s -- and I suspect it's been in decline ever since.
The New York area newspapers used to have stories back then about people who would get up at the crack of dawn -- or even sleep in their cars in the parking lot -- to get a good weekend tee time at public courses. I don't hear stories like that anymore.