Whilst i dont think your analogy is correct i take the point that the problems with Brexit trade was not the reality of importing/exporting to a 3rd country (it was taking place before, and continues post Brexit) , but the resources allocated to it, both by HMG and those undertaking the importing/exporting.To draw an exact parallel. You live in a little village which has a school, a shop, a health clinic and a sewerage treatment works. It is more than capable of looking after the 500 households.
You now add another 500 to 1000 houses, with no additional investment in local infrastructure - school is overcrowded, roads are blocked, you can never see a doctor, and everytime it rains the sewarage overflows into the rivers.
Exactly the same has happened with Brexit. We had the systems in place to manage our international trade - 50% within the EU, 50% outside.
We overnight mandated that 100% of our trade, customs and immigration has to go through full border checks, but we haven’t got the resources in place to deal with it all. So we have sub optimal systems that do not work and are just getting worse by the day.
Even travelling to and from Europe is a pain - you spend most of your time going through immigration.
Travelling to Europe is no more difficult than travelling anywhere else, factually prior to Brexit there were more Brits living and working outside the EU than in it (excluding the UK of course).
