There is a lot of truth in what you're saying. And YES most detractors haven't ever owned one, sharpened one or used one. I know I run into them all the time. I bet the SE STretch was a really decent blade. There are a lot of the older SE models like the C-54 big Calypso for instance that the fully SE model is just about a valuable as the PE version. That's also true with the Lil T, Military, and the older first edition Ayoob model. Try finding one of the 3 I just mentioned in SE if you don't believe me>> and when you do find one they aren't cheap at all. Now I won't argue that the PE will always fetch a little more money.
Try finding a serrated JD Smith, Viele, or even a Renegade in SE for that matter. You will be looking hard for all 3 of those I can assure you. And you will see that the SE versions do have their admirers for sure.