Defogger problems of the 2009 Honda Accord

I have a 2009 Honda Accord. I began having problems with the a/c not cooling, so I took to the dealership for assessment. I was informed that a line was not working and I had a freon leak. They placed dye in the fluid to determine where the leak originated. They determined it was coming from the condenser. This part is located in the grill of the car and isn't protected in any way and they decided it had been damaged, without proof, from something I had hit, such as a rock. They then inform me that my full warranty does not cover it, and informed me it would cost $432. 00 to repair. They also cannot guarantee that it will not occur again and again. The freon continues to leak and will not cool the car. It also causes a foul smell to come into the car. I do not believe consumers should be responsible for paying to replace a part that is put in a place that is vulnerable to debris or anything, without protecting it in some way.

Ac condenser failure. Which stops working air conditioner and defrosting. A pebble or something can hit the condenser and make a hole. Mfr don't want repair it during warranty period or can offer any remedies to prevent it from happening.