Headlights problems of the 2008 Mazda Tribute

2008 Mazda Tribute condensation in sealed beam headlight. Dealership is saying that Mazda corporate sent out an email disallowing the repair of headlights with condensation in them. The corporate email apparently states that this is a "normal" occurrence and will not be covered under warranty. I am afraid that this could impair our night vision or lead to an electrical short in the vehicle. Please investigate the validity of Mazdas claim since water should not be in the headlight. Car is at town north Mazda in richardson TX.