They were. It was an advisory referendum. Consider parliament advised.
However, as a citizen along with many other millions, I am entitled to disregard both the results of the referendum, the arguments (or lack thereof) for Brexit and maintain a different opinion. I can also expect a representative democracy to mitigate against the will of a relatively small majority and comment about, complain to or vote out and representative that I believe is not holding the decisions of parliament to account either by blindly following dogma or inadequately scrutinising legislation.
This is what you voted for when you wanted to take back control of our democracy and you should be celebrating the fact that I do. If you don't like our democracy you can, as far as I'm concerned, leave and live somewhere else.
Oh wait....