Papillon & GT.
Why is there no point. Ground staff, check on or otherwise are undergoing 21 days training to cover cabin crew roles, and only the basic legal requirments - not premium training etc.
Is it impossible that cabin crew could be given 21 days of training to cover a strike by check in staff?
Your suggestion is akin to the average Daily Mail readers view that all cabin crew, (in any airline), do is serve tea and coffee.