Stunning job !
As for this or that being "correct", I remember hearing pretty much the same thing about my own car (back in the day), where somebody would make some wisecrack to demonstrate his "superior" knowledge over mine. I didn't appreciate it then, don't now, and I've learned to temper my remarks to others because I'm not nearly the expert I thought I was.
While there was a tremendous degree of standardization (borne out in sales literature and the repair manual), there are clear examples of stuff the factory did (and shouldn't have) and things they didn't do (but should have).
In my experience (which is extremely dated when it comes to these cars), never say "never".