It's more fun when there's some competition;
But until the point that sport becomes an addictive part of life, what incentive is there to peel ourselves off the couch when we have that pang of guilt during the Sochi cross-country skiing? It's virtually impossible to find an available venue on demand (upon pang) and furthermore, to find someone to play against (a friend or otherwise who by some freak turn of luck just had the exact same pang of guilt). How lucky. How unlikely.
I'd be much more inclined to get off the couch if I knew I had a place to play (without calling around and Google searching "squash venues near N1")? Even more so if I knew there was another person out there, just like me, watching the never ending torture of those uphill polers, who longed for a competitve opponent to force him out of the house.
That game. On demand. No apologising. Just the game. Click a button. Say your hellos. Sweat out any fury. Love every moment of it. No more waiting. No more missed opportunities. No more sitting on the couch, sitting through the pangs. I'm in.