For goodness sake, let me try yet again to clarify. In the absence of any compromise (the like of which you mention), the manufacturer recommends replacement at 10 years. Clearly, that does not mean tyres will last 10 years regardless of mileage, condition, neglect, performance etcetcetc.
My gripe is being told my tyres need to be replaced when they simply reach 5/7 years despite the fact they have Zero indications of compromise.