Why a reality show must have unbiased host?

Even if the Host is supporting a right person, I think his bias shouldn’t be so direct and I’m saying this because having bias toward one team is actually disadvantage for that team especially in a show like Bigg Boss. The fact that Shukla team hardly get any criticism it kind of make them feel like they arent doing anything wrong. As bagga said in her interview that in a house like bigg boss where you’re spending 24/7 with same people .. you get so fed up sometimes and end-up doing some things and dont even realize them until Salman point them out. Rashmi guys have been getting constant feedback in the form of Salman’s lecture, which give them a chance to not make same mistakes again or at least be cautious next time. On other hand Shukla guys have only gotten mostly praises. Now the situation is like this that every Shukla gang person think they’re always right.. they’re way over in their head at this point 🙄