I disagree. Burnham hadn't said anything meaningful about his policies pre his coronation, and I've criticised that process. Had their been an election involving him, I'd have wanted to know before deciding whether to cast a vote for his party. Having never voted labour, I'd have taken some persuasion though.
Farage, in contrast, has said plenty. Playing the tape forwards, I think he'll be a disaster. That's what all voters have a duty to do imo. If he's elected, heaven forbid , I'll give him a chance - what other choice is there.
Back to your initial point, I can't be partisan towards a party I've never voted for, or a bloke I've never voted for.