It's competitive but more like chess is competitive. It's cognitive, but SC2 is much more reflexive than anything else. Learn the macros and the commands, do it quickly and efficiently, and its anybody's game. It takes time and dedication, and requires skill that some people will never have (like me). But I wouldn't say it comes anywhere near competitive pro sporting events like hockey, football, soccer, basketball, tennis, or even golf.
I don't mean to pick on you but...
"It's competitive but more like chess is competitive."
- Exactly. And chess is competitive. The problem here is that some people would have you believe it's not a competition unless someone is risking a broken leg in the process. And regardless of how cool you think chess may or may not be, many people will never reach the level of the good players - or even close to that level.
"Learn the macros and the commands, do it quickly and efficiently, and its anybody's game."
- That is like saying, learn to dunk and basketball is anybody's game. Not exactly, learning the macros and the commands, doing them quickly and efficiently gives you a leg up on the casuals but basically just gives you the right to enter another league of play. When all of your competition knows those same macros and commands you are basically on a level playing field where your actual ability to formulate strategies and out-think your opponent becomes the game winning skills.
"But I wouldn't say it comes anywhere near competitive pro sporting events like hockey, football, soccer, basketball, tennis, or even golf."
- That is because these events are only as big or as small as their following and budget is. Most major sports are about entertainment first, they have to be fun to watch. This is where a lot of video games become prohibitive. However, if you look at say, the Street Fighter 4 community, you would realize what some dedication and commentating has done for it as a spectator sport. It actually becomes a lot of fun to watch when you see people rallying around their favorite player and a commentator hyping things up - you don't even need to know what is going on. It makes you begin to realize what would happen if say, they had actual decent commentators and an actual decent budget. Season's Beatings last week had 9500 viewers, now that is nothing compared to your average sporting event, but it is still a considerable number of viewers for something like that.
There is also a certain mentality that prohibits games from being as big as they could be. And that is this "games are for children, xyz time spent becoming better at them is a waste of time, and this will never be a real competitive sport". That mentality itself, held by so many people, prohibits it from growing to it's natural capacity. If games were embraced as competitive what we would see is a natural life cycle where competitive games breed competitive gamers (and fans) which breed more competitive games and repeat. Until we actually had games so complex that someone would be able to admit that xyz game actually can take 40 years and a lot of skill to master.