"I'm a business owner. As such, I just see no sense whatsoever in undertaking an action that would very likely damage my business, even if my employees wanted to do it. As the owner, I should take responsibility for ultimately making the calls in the best interest of the business and their jobs."
Yes, and? What's your point?
I see running the country like running a business. You do whatever you can to grow it. I can take whatever my employees tell me on board and consider it seriously when making decisions, but I am tasked with leading the business when it comes down to it.
It doesn't mean I'm against democracy, but we put these politicians in place to represent our best interests - if they're "owning" the business of the country and see that Brexit is obviously stupid, then they're tasked with making sure the "business" does what's ultimately best for business. If they shirk that duty because they're playing personal politics ahead of the interests of the country, then they are negligent in their duties.