There is one problem with shaped skis. Most kids who grew up knowing nothing else can only turn by putting the skis on edge and riding the sidecut. They don't know how any other way to turn. They don't know how to pivot which you kinda need on occasion. Moguls, for instance, require slipping and pivoting skills.
Back in the day, when we were running 200cm+ skis, nobody talked about sidecut radius. I don't think the manufacturers even measured it. If they did, they'd be 40 meters or so. If you rode long, straight skis the same way most people ride shaped skis, there would be a lot of body/tree interaction.