A fair point. It still took people to vote for it, for whatever reason they had. Being increasingly insular, which is exactly what Brexit dictates, is almost a definition of being a Little Englander. Increasing insularisation (is that a word?) has never been good for an economy.
Why does Brexit dictate being more insular? Who says we want to be isolationist? Just because we voted to leave the club of the EU and wanted to regain our own border controls and national sovereignty does not lead to us wanting to close ourselves off from Europe or the rest of the world.
Yet again a narrative has sprung up which doesn't fit any facts; instead serving to fuel people's sense of indignation about the course that we've set ourselves. I expect it from some contributors on these threads, but not you. And, frankly, the issue is complex enough without flannel being thrown at it.
The whole point is to allow us to get out from behind the EU and directly deal with the rest of the world; where the bulk of the world's trade and population are. How people can portray that as a desire to be isolationist is beyond me.
P.S. I second Sunleader's suggestion that another Brexit thread isn't really warranted.