A simple question

In the last election last week, exit polls were roundly spanked as inaccurate.

At the same time, we are hearing poll after poll coming out about voter percentages, voter preferences, and voter composition.

Uhm, exactly how are these statistics compiled? We have anonymous ballots. There is no record of whom I (or anyone else) voted. Has it occurred to anyone that these polls, just like 90% of the other polls out there are also wildly inaccurate? Why do they persist? Is their no congnitave dissonance?

Give it a rest already!