You can question a theory if you have evidence to back your arguments. A good scientist will accept if they are wrong. Of course humans are imperfect and we don't like being wrong. Financial and political pressures can play a part too, but I think we need governments to fund science as business will only go where the profit is. Science can be expensive and funding has to come from somewhere (Steem!). We need good science to counter the propaganda by vested interests in harmful industries such a fossil fuels and tobacco. They have vast funds and don't want to change.
Oh, and much as I respect Dawkins he needs to give up bashing religion. I don't believe either, but he just looks bad when he does it.