I think it could affect their chances to become successful with the music directors. When you start thinking you are the best then,your attitude changes which does not help u with the music directors who have a lot of choices now in singers.
I remember in the 70's there was a singer called Jaspal Singh who got to sing some songs for 'GEET GATA CHAL' and the songs became hits and a couple of newspapers said that he was the next Rafi. I knew him personally because we used to practice together every Monday in Bombay. The articles got into his head and when Ravindra Jain who had given him the break in 'GGC',selected another male singer instead of him he went and argued and showed him the newspaper cuttings. RJ finally told him to get lost and i don't think he got another shot at singing in the industry . He had to go back to Delhi and possibly sang for Punjabi films.
Therefore I suggest the remaining contestants to be like Nihira and take your wins & losses as they come,without creating any scenes even if you do it on the say so of your mentors.These same mentors will kick u out if the songs you sing are not salable.Diplomacy and Chamchagiri with the music directors is the best way to survive in the music industry in India.