Should every perspective (including creationism) be taught so no one is indoctrinated? Yes.
There's an infinite number of perspectives.
We know creationism is wrong, so why teach it?
You might as well teach alchemy along with chemistry so 'nobody is indoctrinated' or invisible smurf forces along with gravity. At best it's a waste of time for people who deserve a serious education, at worst it seriously misguides them.