Why Grandmasters Love the Sicilian Defense

Every variation of the Sicilian Defense : r/chess

Sicilian Defense: Full Guide, Main Lines, Secondary Options

File:Old Sicilian, Open, Accelerated Dragon Variation of the

O'Kelly Sicilian: Complete Guide - TheChessWorld

Sicilian Defence 1.e4 c5: Second Edition - Chess Opening Games

Sicilian Defense, PDF, Abstract Strategy Games

Sicilian Defense: Old Sicilian Variation - Chess Openings

The Offbeat Sicilian - Schachversand Niggemann

The Modernized Anti-Sicilians – Volume 1 – Rossolimo Variation - Thinkers Publishing

Why would White play 2.a3 as their 2nd move in the Sicilian Defense? It's not an accepted opening and I see no benefits. How would you go about strategizing a reply, as