That's true.
But if you look at the number of beginners in those all other sports or activities, such as offroad motorbikes, offroad bicycles, downhill, parachuting, parafly, alpine ski, water ski, windsurf, kayak, horse riding, etc., you see that all of them are declining, year after year.
Most people nowadays are not attracted by these outdoor activities, involving some risk, requiring proper training and skillness, and some decent physical fitness. These have been replaced by videogames, social networks, and more "soft" real-world hobbies such as photo, video making, sound recording, playing music, drama theater, etc.
It is a cultural shift, and I do not see any way to bring back the world.