Not all that long ago, there was a large disagreement over just this thing and how to promote the CL hobby/sport or whatever. There should not have been. Althought most professional athletes probably no longer view their sports as hobbies, any sport is still someone's hobby, regardless of whether s/he participates or just watches. If anyone enjoys it, but it is not a necessity, then for him/her, it's (by definition) a hobby. Many hobbies are sports. Flying in competition is a sport and, for most, also a hobby - something they like to do in their spare time. There aren't many pros out there! Building is most often a hobby, but not for everyone. Sports and hobbies are neither mutually exclusive nor identical categories; they overlap, and CL is both sport and hobby. 'sorry to be so clinical about this, but sometimes dictionaries are where the answers lie. Of course, some of us harbor larger views, ...thought Krauss as he rolled his Spitfire into a screaming dive after the feared BF-109 of Adolf Galland...
SK