It's just because they're cutting all of the annoying training scenes down to the bare minimum and getting straight to the fun parts.
Although a good writer can make the training montages fun as well by having a cheerfully homicidal training instructor.
what training, what fun parts? Saintess is introduced, then 3 pages later they are already shown defeated in a forest, and in these 3 pages they talked with some knight captain who appeared in the story out of nowhere, agreed to go on an adventure, called saintess stupid, talked about saintess looking for a hero at the banquet, and also travelled all the way there with the marques daughter referencing their defeat ("I slipped up"). And then it's immediately back to MC.
It's a mess, not 'skipping boring parts'