That is the automotive equivalent of the guy who says “I’ve been smoking for X years and I don’t have lung cancer, or emphysema, or heart disease”. The word that is missing in both cases is… “yet”.
Everything tends to work well… until it doesn’t. Preventive maintenance is the way to keep problems from taking place, or at least to forestall them.
I bought a “grandma” car in 1977. It was a 1960 Ford Falcon, and it had been driven less than 20k miles in 17 years. When I had my mechanic go over it to see what was needed, he said that the brake fluid contained an incredible amount of water. Luckily, the wheel cylinders weren’t damaged, and I was able to drive it for several years without incident, but if I had needed to brake on a long downgrade before he flushed the brake system, I almost surely would have lost braking ability when that mixture of brake fluid and water boiled.