Now there are allegedly tens of millions of players, maybe 5-10 times as many as there were 20 years ago. No one knows, except for perhaps a few folks at WotC, but certainly they talk big.
We still buy a higher percentage of books than kidz these daze.
We matter, economically speaking.
With all due respect, if you have already admitted that you don't know the player demographics, you cannot then reasonably state that grognards are particularly important economically.
We don't know the demographic breakdown of the sales numbers. We should not make claims on such.