But you are saying this because you _agree_ with the politicians. You believe your preferred course of action is better than most peoples'. There are different viewpoints and pilosophies on what would work out best. There is disagreement on what course of action will get society through it and optimize future outcomes. It is egotistical, and poisoning the well, to call everyone else egotistical and selfish because they disagree with you and the politicians you support.
I think that people left to themselves _will_ disagree with one another, but will make decisions based on personal reasons, such as trying to get their business to survive, or to gain an advantage, or just because they don't particularly fear death, or any of thousands of other reasons. I may disagree with their decisions, but I'm careful about my own judgement of "what is rational" in someone else's circumstances, or even about my own knowledge of how they should optimally behave. There are too many politicians who believe they know how everyone else should do things. Certainty in knowledge is rarely real. The compromise is to let people decide for themselves.