Not a case of hating his answer, it's a case of not believing the predictions of massive job losses, and near-collapse of the UK economy.
It mirrors the fear spreading tactic of the 'remain' groups' pre-referendum, and are only likely to be anticipated by those who realise that they would only be vindicated it the fear stories, somehow, turned out to be true. But whilst we do not know the future, we do know that there is a whole world out there wanting to trade with us; so short term panics by investors aside I believe it unlikely there will be and large noticeable issues.
There hasn't been that much so far. despite the predictions of gloom, and even many 'leave' supporters expected the short term "cost" to be higher than it is proving to be.