It really just depends on your mindset.
Control what you can control. I take care of my cars (not to the point of lugging around extra padding or armor for parking) fairly thoroughly. Park away, drive on the road and not the curbs. No drinks or eating in the car.
In the end though, you have to have the outlook that everything you do is preventative. Once something happens you can't undo it, so if it ever does there is no point in getting demoralized because eventually something will find its way to your cars bumper/fender. There are too many variables to ever be able to keep it mint forever.
All your work goes towards keeping it mint as long as you can, as thats really all you can control.
If you have family members that you lent your car to that mess it up, the solution to that is easy.