Opponents of those inclined to vote to leave the EU often portray them as wanting to shut the UK off from the world and retreat into a narrow comfort zone. In fact the reverse is true for many of those I have spoken to. They regard the EU as a protectionist little backwater and want the UK to step into a wider world, dealing directly with many partners, and open to the world and its influences. Many countries outside the EU have negotiated trade deals with it that give them access to its markets and it to theirs. There is no doubt whatever that an important trading partner such as a non-EU United Kingdom would be able to do the same. More to the point is that a non-EU United Kingdom would be able to negotiate similar advantageous deals with other non-EU countries. EU countries have to let the EU negotiate on their behalf, blending their interests with those of the other members.
Some who want Britain to remain in the EU have warned that a 'leave' vote would constitute a leap into the darkness of uncertainty. Again, the reverse is more likely to be true. A vote to exit the EU would leave Britain able to have considerable influence on its own future, rather than having that future largely determined by other EU members.
There is no status quo. The EU is not static; it will not remain in the shape it has now. Many in the EU want "ever closer union." They want to be citizens of a country called Europe that has its own embassies around the world, its own police force and its own army. They want a Europe whose future is determined by a European Parliament and a European Prime Minister.
A UK that remains in the EU will not be able to prevent that; its voice and its voting power are too small. A non-EU United Kingdom would not be able to prevent that either, but it would not be a part of it. It would remain an independent United Kingdom, speaking or itself in the world's councils and representing its interests through British rather than European diplomacy.
It is false to suggest that the choice is between a UK connected to Europe and a UK that retreats into itself. The choice is between a UK that is a political part of the EU, and an independent UK that is connected economically to the EU, but able to deal with the wider world beyond the European Union.