Does Teaching A Variety Of Scientific Theories Hinder Students?

Not at all, they learn a variety of scientific theories (Big Bang theory, the theory of quantum mechanics, etc.) which helps them understand reality.

What does hinder them is teaching them discredited ideas which are not scientific theories, even though their proponents claim they are.  In this case we have IDiots (Intelligent Design proponents), whining that their pseudo-science isn't accepted as science.  Which is because it is not science: