I think Chris DeToro, Matthew Rose, and BCowen, all have touched the central and interconnected point which is, the economic impediments. Chris's, cost, time and competing interests; Matthew's, lament of the American middleclass reality of rising cost of living to shrinking disposable income; and B's, it's the economy stupid are all interconnected by one central point, the growth of golf via rounds able to be played due to cost.
This GCA group is probably not a good cross section of the demographic that golf must rely on to grow or stay relevant. Many are reasonably well off and not near the edge of an income level that balances their decision on playing more or less golf, unless in the pursuit of big money you simply decide you want to prioritize chasing more money than you really need to be applied to a recreational choice like golf. Hard working people under 50 see their disposable income needing to be re-prioritized to other living demands and recreation goes out the window. The wealth-income tipping point is getting ever higher, and the ability of the working person to afford golf in money and time diverted to make enough to ease up and enjoy is getting more restricted. And, the process is a slow creep. I don't think it is coincidental that new economic studies show that the U.S. per capita wealth standard is falling behind other countries, most recently Canada. Having just seen Australia and New Zealand, I'd like to know what the per capita wealth standard to golf participation number of rounds direction they are taking. I don't know, but I suspect golf and per capita wealth/income is growing there faster than U.S. and they still have time and income to play golf and recreate in general, more. That is strictly observational and I have no stats to demonstrate the impression.
The only demographic golf has a chance to grow vis-a-vis financial ability to play is in the near or already retired sector, IMHO. But.... the number of rounds in that sector have a force weighing against sustained growth because the old geezers are simply physically failing and the natural aging process is a counter-current to growth of rounds on a scale that disposable income and time allow a full potential of growth of rounds. I always remember Mark McCormick saying to GCSAA-and GCOA; 'every time you see a hearst go by, you are loosing market'.
I personally suspect that there is a factor that allows wealth per-capita to be growing in several countries like Canada vis-a-vis the US and may lead to more rounds being played there rather than shrinking rounds here, but we don't want to get into a political/economic discussion now, do we?