a) I don't believe you. You're lying and there's nothing you can say that will change my mind. I live in Australia where I probably drive to a weekend dinner a distance that you call a "road trip". The number of people here who have done 800+km in a day is vanishingly small. 800km is NOT 8 hours. It'll be around 10 at a minimum even if you're on highway the whole time. There's pee stops. There's traffic and animal slow downs. There's leg stretching and snacking. The fact that you think 800km can be done in 8 hours in any setting other than a controlled speed run tells me that you've probably never driven long distance, ever.
b) If you drive 8 hours with your wife in the car without taking any rest stops, then you are both irresponsible adults. Which tracks with the rest of what you say here.
c) Because making car decisions based on something you do once or twice in your lifetime is stupid. Which tracks with the rest of what you're saying here.
d) Can't afford it? Then go on vacation closer. Driving 2% of the Earth's equatorial circumference because you want a vacay is not a fundamental right you spoiled brat. Get your highly educated kids to chip in for a better vehicle, seeing as you raised them so well.
I hurl insults because I feel it's completely justified. And given the string of factual inaccuracies throughout your post, I doubt you specifically raised kids to go into research fields to help the environment. If you had anywhere NEAR that level of prescience and foresight, you would not think along the lines of "I've earned the right to pollute for no good reason".