Greetings,
When I was younger, I chose the Sicilian myself having become fed-up with e-pawn players choosing all sorts of other openings before I could get to my then favourite - the Marshall Gambit in the Ruy Lopez.
From my point of view, I wanted to get a fighting game with Black - the closed openings, like the French and Caro-Kann, did not appeal to me at all. I know - the French does have a lot of pent-up energy, but you have to weather the storm first, something in which I was not interested.
I think that a lot of "Open" Sicilian players wouldn't fancy being transposed into a "Closed" defence like the Advance French.
I'd agree with others here that one should learn to play (main-line) Open Sicilians, if only for your own development as a player - who knows, you might discover that you play certain resulting positions well and thus realize that you've no need to avoid them.
[As an aside, I'm often puzzled at the 2. c3 Sicilian being called a "Anti-Sicilian", as it is no more so than is 2. Nf3, since they both prepare 3. d4. I'd be more inclined to think of 2. b4 as such!

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Kindest regards,
Dragan Glas