[repolfx]

That's not the case. Many of the politicians who campaigned for Brexit have a very deep understanding and had been campaigning for it for large parts of their adult lives.

Indeed, so far their predictions appear to have been more accurate than those of the so-called "experts". For instance "experts" claimed voting to leave would destroy 500,000 to 800,000 jobs. The Brexit campaigners said it wouldn't. The experts were wrong.

Be very wary of assuming that:

a) The people claiming to be experts on a topic are experts

b) Experts on a particular topic exist at all

c) Experts will make better decisions than the people in aggregate

There are all sorts of reasons to doubt all three of these propositions.