Not every beginner wants to carve. Many would probably be happy sliding/skidding down the hill on a long, wide, rockered (i.e., stable) ski. Is that the best way to learn? Certainly not. But if they are out there having fun and are satisfied with skidded turns, more power to them.
Have you tried to teach a first time skier on wide rockered skis?
FWIW, and in my experience, it's not nearly as effective as a plain ol' standard ski school rental ski.
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