I’m driving. There is not a drop of rain in the sky. 2 hours into my drive it starts raining and my windows fog up. Your answer is I should have turned on the defrost before I left. Interesting. Against reason and human nature. But interesting.
What kind of shit-buckets are you people driving that requires you to turn on defrost just because it starts raining!?
I regularly drive in conditions that go from sunny to rainy, or even sunny to snow/slush…that’s pretty much all our weather is where I live. I never have to start defrost mode while driving, ever. I use defrost to defrost and remove ice from the the car before I start driving, the AC keeps everything fine without me adjusting anything no matter the change of conditions while I’m driving.
I generally get cold. I don’t turn on the A/C unless it’s hot out. So generally what happens is, in winter (because of where I live and the amount of daily precipitation) I either leave the climate controls off or I turn them on when I get cold or when my windshield starts to fog over. Not everyone who drives a car drives a nice brand new car with nice modern brand new features.
I don’t know what kind of car you do drive but I will say your experience is probably not the norm and certainly not enough to justify your original statement. You keep using the term A/C which suggests to me that you have climate controls that either automatically adjust to a specific setting when you start the car, or you turn the A/C on every time you get in the car.
How much condensation builds up depends on a lot of factors. Your own body chemistry can add to it. I have a friend who runs hot and every time he gets in the car he cracks the window because if he doesn’t him sitting there will fog that window up.
AC also keeps the car warm you know…and yes, I tell it to keep my car at 21°C and it does just that. Its a Peugeot 308, medium trim level, that’s more than a decade old with +250k km on it, I’m not driving a nice new car at all. My wife’s VW up is exactly the same, also not new and definitely not a “nice” car.