Contrary to the popular saying, the more people involved in making decisions and achieving consensus, the more difficult or even impossible it becomes.
Consensus decision-making is where group members develop, and agree to support, a decision in the best interest of the whole.
So, it may well be easier and more beneficial for the UK to exist outside of the EU, but not necessarily better for Europe and the world as a whole.
Brexiteers are engaged in one of mankind’s oldest exercises in moral philosophy; the search for a superior moral justification for selfishness.
“Selfishness is the greatest curse of the human race.” William E. Gladstone