Whether or not you're personally engaged doesn't impact on the veracity of the statement. It's not even exclusively a Left problem, on the Right you've got whacko Libertarians who believe in near-zero taxation & a state so small it would barely cover a small waterbiscuit. Before Brexit, Fringe Eurosceptics were another breed who gave Tory PMs headaches with their demands for destructive plans.
Left or Right, these are groups of political iconoclasts who insist they've got all the answers if only we tear up the entire rulebook, writing reams of articles and going on speaking tours, usually safe in the knowledge that they'll never win power and have their theories tested.
But of course it has happened recently, more than once. Cameron tried to face down his Brexit flank and got humiliated, but none of the Leave campaign bigwigs ever knew how to make a success of what they'd achieved, and the word 'Brexit' itself almost seems banned in Westminster by consensus. Truss tried to implement a set of ideas lauded up and down the Right Wing Rags as the most "Conservative Budget of All Time" and was forced to sack her chancellor 3 weeks later before following him out the door herself shortly after. The people that supported these extreme positions and have seem them utterly fail are now reduced to "well of course it wasn't done
properly" to try and retain any credibility.
