1. hyperventilating in K&C right after 3-4 minutes of exhausting physical effort in mask is not regular activity,There is no 2-week quarantine before entering the bubble, so there is the potential to test negative and still spread the virus. Not quite sure how wearing a mask is unfair or harmful. Everybody has to do it (so not unfair) and no proven harm in wearing them for regular activities.
2. it's totally unfair in a sense that millions of people are spending long hours in work places without masks every single day all over the world within literally zero bubble environment, taking on much lesser physical activity.
I think these kids and young people have been chosen as dummies for advertising pseudo-efforts and to make viewers feel better.