are you serious? waxing does more than you think, same for xc skis, and race skis, even though people may wax race and xc skis more, its verrrry important to wax your "downhill skis" (twintips) as said above it cleans the base, makes the ski muuuch faster, fills in scratches and core shots, keeps the base from drying up, if you didnt wax your skis for like 1 season they would be soo dry that you probably would need to straight shot a jump when others are making like 4 speed checks,
think about it dude, it does the same thing as waxing xc skis