There is no such thing as tactical voting

Tactical voting is a myth. People who claim to vote tactically (using fptp) merely to reject the other mainstream fptp party are still endorsing a mainstream party so this is not tactical voting. We are not voting tactically if we vote for a mainstream party. We only vote tactically if we reject the mainstream parties. And if it is possible to reject the mainstream parties (as with pr) then we are not voting tactically... either.