"Nothing"? Yes, you are right. There is no reason to think so….
https://moneyweek.com/spending-it/travel-and-holidays/603294/a-cruise-to-antarctica-the-last-pristine-wilderness
https://www.sidmartinbio.org/why-is-antarctica-pristine/
https://snowbrains.com/worlds-last-pristine-ocean-the-ross-sea-of-antarctica-just-declared-largest-marine-preserve-in-the-world/
https://www.youtube.com/watch?v=ZIVSJYazE9s
[- I do agree with you: it is NOT ABSOLUTELY pristine, but it certainly is the last significant place that can stand in for it. Especially for satanic symbolic ritualistic purposes. -]