Why do some people keep saying if Luke is not evicted it's a fix!?!?!?

Mo is extremley dull and boring,

rachel does nothing,

rex has been very nasty

towards rachel this last week! have you thought that maybe the public will evict one of those three before they think Luke should go!?!?
I believe that there are a few other HM's that should go before Luke

because they dont do as much or bring much to the show!