I guess, I was thinking more about club level and thinking about the fact that there are around 10-15 responses to e4 c5 as well
This is the same as saying there are 20 responses to 1. e4, so you shouldn't bother with 1. e4, when over half of those responses are not considerably challenging.
but they are challenging, that's the point
Against e4 or the Sicilian?
The sicilian. Maybe there aren't 10 on move 2, but think about all of the variations by move 5, even.
I think GothamChess is getting to your brain. There’s only 1 really challenging Sicilian variation: the Open Sicilian. Everything else can be taken care of by studying for 5 minutes, 20 minutes max, even the Smith-Morra. There are a few decent Anti-Sicilians like the Rossolimo, but the Sicilian Defense is not a hard opening to learn, speaking from a player who turned from a Gotham stan to a Najdorf Sicilian player.
This is simply incorrect. Closed and Rossolimo both have theory books nearly as deep as the Open. And aside from that, there are some funky sidelines you have to learn no matter what you play. It’s a tad more difficult than you’d think.
Specifically against the Caro btw