Lol @ the snowboarding fashion police.
If I am going to be outside all day, its nice being able to have a bag to store my spare goggles, lunch, fluids and a snack without cramming them in my pockets. Besides, the lift is the perfect place to sip on some powerade (hydration pack ftw) between runs.
Snowboard carry is an added bonus for hiking back to the condo.
I guess being 'core' includes paying $2 for a snicker bar and $3.50 for a soda at the lodge since you don't carry a pack at the resort?