Without trying to be rude, it seems you may have a somewhat distorted
understanding of what happens in normal operation of aircraft, ASIP.
Oh, don't worry. I started this thread when discovered I had very little idea about what happens in normal operation of aircraft. And if initially I thought it's a way of doing business in one particular Air Force, now I see, thanks to the sincere help from all of you, gentlemen, that this is an absolutely common thing regardless of a country.
This was my problem to marry my structural and maitenance experience with operational reality. This discussion forced me to read more about structural issues in fighter planes. I hope now I understand where my original assumptions were wrong.
I don't know whether I should explain what I found. I would like to, however it can be lengthy writing and boring to read.
I'll try and we'll see.