The attempt to attack Corbyn by drawing comparisons with Truss is bizarre. I can only assume that a mildly conscientious sub-editor inserted the bolded bit because it contradicts everything else he has to say about that particular analogy:

In her mix of utter conviction and utter obliviousness to how she might come across to anyone who doesn’t see the world the way she does, the politician she most resembles is Jeremy Corbyn. Like him, Truss is convinced the policies she advocates are popular with a majority of the public. For Corbyn it was nationalisation of the utilities, more money for the NHS and cheaper housing, all of which poll extremely well. For Truss it is secure borders, lower taxes and an end to burdensome environmental restrictions. In both cases, the explanation for why the things the public want never come to pass is the same: the system is stacked against the preferences of ordinary people.