If you think the decision process involved in the Brexit-vote (whether vote for "Leave" or "Remain") for each and every voter, and compare it to the forum posts regarding designing a simple power supply "I need to build an adjustable lab power supply" or designing a simple active load "I want to build a simple active load using a MOSFET and op amp" there are quite a lot of similarities. People want quick and fast solutions without having to think too much.
You may say that the task of designing a simple power supply or active load seems pretty simple. But in reality it is actually pretty difficult and you need to have rather good knowledge about the electronics in order to get that right, not ending with a oscillating design or a design with the magic smoke coming out. The task will be very difficult when you need to have it right at first try, no second design allowed, similar to the Brexit-vote.
Typically the designs are based on the simplified application notes or the designs found floating in the Internet which are missing the needed circuit elements to make the design stable and robust. Butt the designer doesn't really really have the knowledge and understanding that is needed in order to make a judgment what is a good design. Actually the designer with limited knowledge and experience typically have a genuine feeling that they do know how to design it properly, and only at later stage find out that the are lacking the needed knowledge.
Similar thing with this Brexit-vote: Very few voters really understand the big picture, how the things are interrelated, how the decision is really going to affect the voter, his/her family, and how the complex society and economics work in general. The voters want to have a simple, quick-fix for the current problem like immigration, current-government-suck, NHS needs more funding, and do not see how their decision will affect their lives and the general economics tomorrow. And the voters may really genuinely think that they have all the information needed to make the right decision.