the show producers must be selective on who gets to go on the show and can create the most contravesies
Absolutely. I've been on a couple of game shows now and can't believe some of the underhanded things they do.

At the try-outs for 1vs100 you are given a 50 question quiz. Thought I did fine and was a shoe in with 45 right...especially considering the guy next to me got 19.
Then they made us all stand up and said, "Ok...everybody that got between 25 and 35 come with us for the next stage...everybody else...thank you very much...we may be in touch, you can go home now."
So on 1vs100 the actual 1 contestant will only ever be someone of percieved average intelligence. They don't want anyone lacking or harbouring too much knowledge.

Why is it most game show hosts remind me of Killian???

"Only in a rerun!"