almost every test with motor damage!!

hello people! wanted to give me a try. a 6 cylinder, if already. have been a lot rumstöbert and found a lot………….but one thing makes me really stunned. why did 3/4 of the cars I saw have a motor damage???????? how does that come? is the motor so sensitive or can all not drive a car. I drove from 4 to 8 cylinder cars that had far over 300000km on the jack. but I had a motor damage up to now never!!! the 6 or 8 cylinder you do not need to drive to the limiter so that it goes away. when I drive my car I turn the max. up to 5000/upm (if the engine is warm) everything about it I personally find already too loud (what the howling of the engine concerns) and don’t have to be with me. I just don’t understand why so many with the probes are to be sold with motor damage. so I’m better off.