Take it back, Game of Thrones was 100% realistic.
Pro Ice Climber Rates Game Of Thrones And Other TV/Movie Ice Climbs For Realism

This is a video from Insider of pro ice climber and Red Bull athlete (why climb when you can have all the wings you want for free?) Will Gadd rating ice climbing scenes from 9 different TV shows and movies for realism. Selections include climbs from Game Of Thrones, The Lord Of The Rings: The Rings Of Power, Jumanji: The Next Level, and Alien Vs. Predator, among others. I learned a lot by watching it. But mostly just how much I hate the cold. The closest I’ll ever come to ice climbing is the time my sophomore year at wizard college a witch let me touch her boobs. My fingers are still numb. Two frostbitten thumbs up, no regrets.