Indeed, it is impossible to make rational decisions when all the information you’re basing your reasoning on is a lie.
Intuition however is problematic in that you’re prone to cognitive biases, wishful thinking and being manipulated by people who know how to play on intuitions.
It’s more than nothing at all, sure, and it’s supposed to be better for decision making with too many variables to rationally consider, but with some people’s intuitions favouring one way and other people’s intuitions favouring the other when it comes to politics, it’s as though there’s no objective basis to figure out any correct choice - except perhaps having faith in the “wisdom of the crowd”. But politicians are constantly feeding your own confirmation biases, so it’s less down to your intuition and more down to their ability to manipulate your individual partiality. You might argue that good manipulators are important for political discussions, but however good you might be at winning people over, it matters what you win. Boris is a Tory, and as such even if his charm over a gullible electorate extends to others who are experts in playing the same game, what he is going to win is going to be good for capitalists and bad for wage labourers.
As you say, Corbyn does present himself as rather humourless, but if I want a job doing I’m going to hire the serious candidate instead of the buffoon. Moreso than that, I’d rather vote for the one who represents me and the majority of the population, which in both cases is Corbyn. All politicians are ideologues: they’re supposed to represent a political party and their collective ideology - Boris is no different, no matter how entertaining he might be on your TV. Comedies are not politics, nor vice versa - I find this slow transformation of politics into a reality TV show disturbing. Another reason not to condone the same descent that the US is suffering from and go with the more boring option who’s still actually trying. That’s a fourth reason compared to zero for Boris.
People find it effortless to fall back to trusting their first impressions and personal partialities, but I don’t work that way - I attempt to distrust myself as much as possible to make sure I’m taking as many viewpoints into account as I can think of to see what emerges as independently from my own biases as possible. My own intuition is just another factor amongst many with no more or less weighting than anyone else’s intuitions - or at least I do this all to the best of my ability, and even then I hold my conclusions accountable to new information that might change them, which I’m constantly seeking. Even in the lie-riddled arena of politics there are objective truths on which to base your decision, and that’s all I’m doing in favouring Corbyn. This “honest lies” tack is not compelling.
It’s also an objective fact that the UK media is overwhelmingly right wing in their political endorsements, with only really the Mirror and the Guardian leaning left, and even then only really neo-Labour left. It’s an objective fact that they’ve collectively been running a several year long campaign to misrepresent and ridicule Corbyn and steadily erode the overwhelming support he began with, if you still remember. Facts like these are what the rational voter ought to be paying attention to. It’s also a fact that Boris has a history of failures, some of which are listed here.
I’m not suggesting that Brexit will never happen because it was meant to be political filler, I’m just saying that it’s convenient political filler given that it will never happen. The direction of causation matters here. The referendum was on 23rd June 2016. Have any of the Tories got anywhere in the past 1244 days? How many promises have they made in that time? Or is it good that they broke so many promises and got nowhere because the promises were honest lies?