No, it's saying win the argument. If you want left wing MPs, stand more for election and don't vote for those who don't stand for what you want. If left wing MPs are popular, they'll be elected democratically. This already happened:
https://www.huffingtonpost.co.uk/en...ns-unite-momentum_uk_5dcd737be4b0a794d1fc1071
The problem is, Labour got thrashed as people generally wanted nothing to do with them.
Don't artificially elect an extreme left wing leader of a PLP that isn't remotely close to being extreme left wing, because then you get Corbyn, the resultant disconnect and unelectability. You need a system that reflects the
electorate, not the membership.