If anything because they'll have to rewrite thousands of
laws and procedures that came from the EU times, and deal
with the caos that that will cause.
I've never understood this argument. Surely all you have to do is write a law that says: in the absence of British law, default to EU legislation. That's the essence of the great repeal bill, is it not?
They have to negotiate with the EU so that they're not
completely cut out of commerce, with nothing to offer in
exchange and therefore no negotiating power.
Uhm, there is the little matter of the ~£60 billion shortfall that the EU has to find from somewhere.
It's old people in the country that have decided this,
based on their ignorance on the matter...
What makes you so sure that old people are more ignorant than young people? I think you'll find that it usually works the other way round.
I'm Italian, just talking based on what I've read and a
handful of friends who live in London
Take what you hear from London with a massive pinch of salt. The EU has done very well for Londoners, thank you very much, and they aren't very happy about the fact that the rest of the population of the UK have just made their comfortable futures a lot less certain.
Consequently, the rhetoric aimed at the other side comes with more than a little hyperbole.