You didn't waste your time. After 40 years in automotive engineering I just learned something new. Your explanation should be published in the owners manual. As a guy who is always asking "why?", I appreciate the reason why a break-in period is needed. I knew that mating parts needed to be cycled to be worn in together but I didn't know that the (excessive) heat played such a major role. I thought it was excessive stress, but then what causes the excessive stress? The heat!