With Fptp we are forced to join a political team

There is no reason a government should be allowed to have control if they have not been elected fairly.

With proportional representation, to vote for a party of big government is an active choice because there are parties which will offer social liberalism without big government. Under Fptp we have no choice but to vote for the party of big government if we don't like the centre-right party, and consequently we are forced to vote for things we don't like. With PR we can vote for the precise amount of oppression (perhaps justified, as might be the case with issues to do with crime) that we would like and no more.