That's not realistic or logical at all. Adele does have a duty as a singer, but depending on circumstance, she can easily go off-key. She did at the Grammys because of a technical fault. ANY model can fall depending on what shoes they get or the runway - that would be the technical fault for them. Nothing to do with skill, but circumstance. There are some notes Adele can't sing, and some shoes or runways models just can't walk on.
In scenario, you can't put a girl in 10" platforms, a long dress and send her on a slippy surface and say "don't fall, it's your job". It's like putting Adele in a freezing cold arena, making her drink milk and playing her music out of sync. It just wouldn't work.
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