I found that interesting about going through the complete games as part of the theory, I am usually a "forced-lines" man after using Stockfisk and its brute force to depth=33 and move 45 in the 6. Bg5 (recently with 6...Nbd7) lines as home preparation. I remember back in the early 2000s when I used to analyse the Najdorf Poisoned Pawn down into move 40+ because it was just more fun, despite being much more dangeorus than playing against, till exempel, 1. e4 c5 2. d3.
I suppose it is perhaps psychological, the anti-Sicilian stuff has plagued me actually longer than I had in my other thread where I struggle to equalise quite often as White in the opening, and usually get destroyed off of the board in many games. The Closed Sicilian with 6. Be3, for example, always considered harmless and usually not analysed in severe detail in most Sicilian books, has caused me extreme problems since 1999. I believe that in my entire chess career, I only have one win against the 6. Be3 Closed Sicilian out of perhaps 12 or 13 (cannot remember exact number) games , and that was back in 2004.
I agree that it is a weird thing to fear an easier equalising anti-Sicilian choice by part of White, but many things I find more difficult and defies logic, like how I usually find it easier to secure draws and play straight for the win as Black, but as White I want to at least equalise.
In fact out of my entire Black repertoire, the anti-Sicilians are the only group of openings that I can feel the "traditional" disadvantage of not having the first move. Just weird, I guess. But at least I have
The Killer Sicilian for some new anti-Sicilian suggestions

But I still wonder if it is true with other Sicilian players that anti-Sicilian White players tend to play main lines against Pirc and Caro-Kann.