Excellent article, Josh. I always roll my eyes when I see someone proclaiming that baseball is dying. It certainly goes through cycles (as does any sport, including golf) but the game has endured for 150+ years and has weathered crises much more serious than declining television ratings or the length of games. It may not be THE national sport as it once was, but the game will endure as it always has. Same with golf--it may not be a widely popular sport, but the game as we know know will not die.
I'm wondering when the articles about the death of football will start to come out. It's trending that way, but football too will survive. Although, if I had to put money on which sport will survive over another, I would bet on it being baseball more than football. Baseball to many of us, even casual fans, is the sentimental favorite, whereas football is about the event more than the sport, if that makes sense (it's hard to articulate). But if I had to choose between my favorite baseball team and my favorite football team, I go baseball. As Rich said, baseball is the most perfect game there is--it has everything, whether team play, individual battles, strategy, tactics, good luck/bad luck. Other sports have some of that but not really all of those at the same time.
Getting back to golf, yes the business of the game will change (as it has in other sports), but the fundamental qualities of the game will be just fine.