That's why there are elections, the vast majority of the electorate really isn't equipped to deal with all the details and ramifications of what a big decision like this entails: therefore we choose representatives whose ideas we agree with so that they, along with experts of choice, can deep-dive into the consequences of each decision and make appropriate choices. For example: ask me about agricultural policy and you'll find out why I should have no business in making any sort of significant decisions about it.

It's the same reason we go to a doctor when we're sick or to an architect when we want to design a house: we go to someone whose job is to know how to do something properly.

In the Swiss model you'll never find single, completely vague and as wide-reaching questions like the one that lead to brexit.