Whats efficiency got to do with presentation
Some like a nice box others are happy with a $3k device in a vanilla envelope for various reasons ECO or otherwise
This device like the Pro 6 Fold released just for the Korean market (probably why there is a charger) is likely more aimed at that market and will please some, but obviously not you
I simply suggest Samsung opted for this presentation format more for their home market and nothing to do with your thoughts on battery endurance