Hearing GoldMiner's speculation, Bianca was surprised and started to doubt if it was even possible to deactivate Weiss' reality manipulation.
Even Winston, JordanPlayz, and Kuroneko were surprised since Weiss was very powerful due to his reality manipulation superpower. So if that superpower was deactivated, then wouldn't they stand a chance against Weiss if they ever fought against him?
They didn't have any hostility against Weiss and they were even grateful for him since he carried them in Cozy Vacation Life.
However, it's the nature of life to surpass those at the top. Since Weiss was the strongest in Blue Star, a lot of people wanted to surpass him so that they could become the strongest.
If they could defeat Weiss, then that would prove that their team was the strongest.