I'm trying to figure out why people do it.
http://ontheroadtochessmaster.com/confused-by-opening-avoidance/
The first four paragraphs:
Confused by Opening Avoidance
I have once again been somewhat active on the chess.com forums, and one of the things there that has always confused me is the lengths that some will go to in order to avoid opening theory.
One thing that really has me scratching my head is one of the main reasons that is given. It usually goes something like this: “I don’t want to have to play an opponent who will play the first 20 moves like Kasparov/Fischer/Houdini/etc..”
Two things that I should clear up at the beginning are that until recently I rarely studied openings (although I didn’t avoid mainlines) and that when I speak of avoiding theory I don’t mean avoiding certain playable minor lines (i.e. Sicilian Alapin, any of the Bb5 Sicilian lines, the Four Knights, etc.) as those are typically fine. What I’m talking about is people who play the 2.f4 French or the 2.Na3 Sicilian and other garbage like that.
Now yes, you can point to a guy like Jobava who plays weird stuff, or you can find games that GM’s have won in the 2.Na3 Sicilian, but there is a reason you can find only one or two instances of GM’s playing absolute garbage.
/ The rest
I'm trying to figure out why people do it.
http://ontheroadtochessmaster.com/confused-by-opening-avoidance/