Oh course you’re entitled to your opinion, as is everyone else. However, I have built and rebuild engines. I have friends and family who do the same, some participate in drag racing (cars and motorcycles) both amature and professional. I don’t agree with you, nor do any of them. In case you’re thinking, “yes, but these are race engines under severe use...”, realize that the effects of breaking in an engine are not different regardless of it’s future use. Some will ignore the decades of experience that I’m referencing, and I really don’t blame you since you don’t know me. You should at least heed the post above by HammerHead. Unless you think he’s lying (which I am certain he is not) then his process and the resulting metrics are not disputable. The wear metals were very high, which is exactly as I said they would be. You can leave that particulate floating in your oil for as long as you want. Your engine won’t be severely damaged; but your rings, bearing and seals will not last as long. This is a fact, but if you don’t keep your vehicle for the long haul then it won’t matter to you. The relatively low cost of a few quarts of oil, a filter, and 30 minutes of my time is definitely worth it to me. If you want the opinion of a professional then seek one out. Your service writer is not qualified, and unfortunately most of the mechanics in the service bay haven’t rebuilt an engine since they were in school. I’m not being disrespectful, just my honest opinion based on my friends who are mechanics at local dealerships. Find a local speed/racing shop (a real one, not a parts seller) and talk to them. I’m fortunate to live near Bandimere Speedway, so there are many in my area.
It’s kinda like brushing your teeth. You can igore all that crap building up on them for a long time without them falling out, but when you do finally chip that crust off you’re likely to find cavities underneath that would not have been there if you had cleaned them more often.