It's normal to have an unfair voting system

We have the first past the post system of voting for no particular reason... there was no thinking in the past to show that proportional representation is worse than fptp. If there was it does not exist today. Fptp is nothing more than an (unfortunate) artifact of history. To choose between fptp and pr is different from other political arguments in that there are no obvious belligerents. Everyone lives under the system of democracy chosen so it is not a matter of weighing the particular claims of one side or another. We are considering something abstract but shared. We are arguing not over what is true but what is best and these are difficult and frustrating arguments to be involved with.