Canon denies warranty claim simply because of living in Texas

In my review of the Canon EOS cameras, I would only purchase one if it is never to be used outdoors. I've had two Canon EOS cameras warranty repair claim denied due to claimed evidence of moisture/water damage to the internal circuit cards. The second time: I purchased my camera on a credit card that extends the manufacturers warranty, so when my Canon Rebel quit working, I sent it in for repair (happened to be just after manufacturers warranty date). I am only an occasional photographer, using my camera maybe at most one weekend a month (primarily Boy Scout campouts... so 24 days/year at most?). When I called Canon, I was originally told "dirty electrical contacts on the power supply circuit card", I did not complain about paying hundreds of dollars for such a simple issue because the warranty was extended, but my credit card required a written statement from Canon. Upon emailing them, Canon changed the verbiage of what was wrong, now claiming internal water damage/corrosion to the power supply board that voids the warranty agreement. I told them that the camera is stored in my house when not is use, and was once transferred to my car while foggy/misty months ago, but never taken out in direct rain or dropped in water --- that the one Boy Scout outing where it rained for the whole time I never took the camera out of the car, and I have never used the camera while it was raining. If any moisture occurred inside the camera where the circuit cards are, it must have happened while in the camera case in my car when the relative humidity rose because of dropping temperature overnight, but there was never any sign of condensation on/in the lens, mirror, or viewport. All this did not matter to Canon warranty department. According to an email sent to me by Canon, the warranty on all their EOS cameras is voided immediately by the temporary exposure of the camera to temperatures outside of 50°F - 86°F or a relative humidity of 85% or more. That means that for most of the cities in the USA (I checked the weather min/max/avg for the major cities in the USA) the warranty is voided as soon as the camera is moved or used outside.

To sum up --- by the working conditions not stated on the box or advertised (temperature and relative humidity limits in the warranty), every single Canon EOS camera is strictly an indoor-only camera that can not be used outdoors in most cities without voiding the warranty, despite all the commercials of people taking pictures and videos of outdoor sporting events and nature. I find it a very convenient way of refusing to repair a camera even under credit-card extended warranty to claim signs of water condensation on the electrical circuit cards, knowing their cameras have a major problem with internal condensation occurring from normal conditions that occur in most cities. My first camera (film) never failed me for 30 years, even through many damp outdoor experiences. I had hoped the digital cameras would be just as useful.  I should not have mentioned to Canon that one-and-only-one-time I stopped taking pictures and put the camera away in my car while it started misting outside and wiped the few small dots of mist off the camera body --- that is all the excuse they needed to claim misuse.