Earlier quoted context omitted.
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It's also a much smaller economy and Switzerland, unlike the UK, is landlocked and surrounded by EU countries. More than half of its exports go to the EU. Switzerland needs the EU more than the EU needs Switzerland.
As for "surrounded by EU countries", unless you're jumping in the same boat as joxdasba and claiming France, Germany, Italy and Austria will all simultaneously attempt to starve Switzerland into submission, that just doesn't matter much.