Nothing I have said is wild or fanciful. I've watched the build of plenty of engines and I assure you it does not happen overnight. Do you know for example what tip grinding is? Do you know how many tip grinding lathes are around? Have you ever seen people at the bench individually hand finishing blades and vanes?
Do you understand that when the evidence of which you speak appears, it is too late for that engine? Don't you understand that engines take a long time to build?
Do you understand the consequences of being wrong and not applying the precautionary principle? I do not think you do.