"Slight digression. UK had a referendum with a simple question.. Leave the EU, Yes/No. Some time later, 650 oxygen theives are still trying to decide if Yes meant No and vice-versa. Possibly best demonstrated in Peterborough, where 66% of it's voters voted to leave the EU, but their MP's first vote having left jail was to vote remain.
But such is politics. A 'simple' decision has taken 2+ years to implement, and when the Commons was turned over to the MPs to come up with an alternative deal, they failed miserably.. So I don't expect too much from future legislation, and it's possibly one reason why Leave means Stay. 650 MPs may have to do more legislative work instead of simply rubber stamping EU diktats."
Oh dear. Simple question does not necessarily mean simple answer, or simple implementation. You see, Parliament wasn't tasked with leaving the EU. Parliament was tasked with 'Could you please leave the EU, but also maintain all of the nice things we got as a result of the EU, like medicine and food.'
If you start off outside the EU then it's not so hard to do this, but if you start off inside the EU you need to work quite hard to do this. If you are in the EU, your economy gets intertwined and entangled with all of the other EU members. Now you say 'let's just leave it', but the process of disentangling the economies might lead to some issues. Everything will be fine (although the UK will be poorer, no doubt about that) in 20 years time. But people are alive now, and want it to be fine right now as well. A few months of no food, flights or medicine wouldn't be good, so there needs to be a plan to make them continue. Because no deal and no planning means food and medicine shortages.
The main reason that there are such arguments is that there is no easy way to disentangle the economies, and also nobody can agree on just how entangled we want to stay after Brexit. Complete separation means hard border through Ireland. The EU refuses to accept that, and won't even talk about anything else until Ireland is dealt with. And by dealt with, there are only three options:
1) Reunification.
2) Goods border in Irish Sea.
3) Whole of UK stays in CU+SM.
May's red lines/ERG cockwombles removes 3). The DUP (and the fact that the NI economy would crater) removes 2). And there isn't enough support for 1). So...what now? You think this is easy, so what's option 4?