Obviously, it was a chance for Gori to save herself. Maybe creatives think that she is entertaining and that's why they have prepared for that task in order to give her a chance.
All the nominated housemates have to decide whether they want to support her or they will have to save one of them.
If they wouldn't support her, they wouldn't reach a decision. Because each one would want to save himself.
Shaleen tried to be over smart by telling them that Archana wouldn't support Gori. He wanted to persuade them to save Gautam. They aren't stupid to save Gautam when they all want to be safe.
So the situation here was whether it's gori who would be safe or no one.
I don't know why Shaleen and Gautam were so confident that no one would support Gauri.