You don’t understand the concept of “not legally binding.”
Nor do you understand that democracy can only work when choices are based on correct information.
In that case, democracy cannot work full stop, because the voting public is never well-informed. In English-speaking countries in particular (but not exclusively) the public seems not to even want to be informed, preferring the rhetoric of the tabloids to a real debate.
In Brexit, we did see this quite clearly: it was not only known, but publicly stated, that most of the promises of Leave were either impossible pipe dreams (separate trade deals) or downright lies (the bus). The public, though, chose to believe them rather than be informed. (Meanwhile, Remain was guilty of its own exaggerations, though it didn't promise Free Cake.)
In fact, the idea behind democracy is that misinformation is not a real problem as long as it is spread randomly. Noise pulls in all directions and balances out. This is why intentional misinformation campaign as perpetrated by Fox and NewsCorp and on Facebook and Twitter are so damaging to democracy: they skew the lies, and almost always in the direction of the (radical) right.