Nelson,
Very good point.
Another possibility is this. Someone who buys a Ford, lets say it is because they got a better deal on the Ford, has already decided that it is junk so they don't care what happens to it.
They drive the Ford and runs it 70,000 trouble free miles. Change the oil whenever they feel like it, drive the heck out of it, never flush the radiator, or any other PM most people do.
All of a sudden, at 71,000 miles, the timing belt breaks and they destroy the head and valves causing expensive damage. "I knew I should have spent the money on an import".
That same person then buys a Toyota/Honda/Nissan/etc. They "know" it is a good car and know if they take care of it, it will take care of them. So the owner changes the oil every 3,000 miles, flushes the radiator, drives like Grandma and other PM.
70,000 miles of trouble free miles. At 71,000 miles, the timing belt breaks causing major and expensive damage. "How stupic could I have been? The timing belt should have been replaced at 50,000 miles, but I didn't do it. My fault. Gosh do I love my import!! The only problem I ever had was caused by me."
Tom