Yes, yes. Understood of course.
These steel doors are getting more and more hard to find, let alone in good condition at all.
Of course when I did this, I was under the assumption that I would never find a set of lightweight doors, so I went in with scalpel and drill knowing that the car is a lifer with me anyway.
I would never want a door car to not function as a door car should, but I was searching and lurking for wins at the haunts and anything goes in that arena.
But to your point GY3, you're right. There are hundreds if not thousands of small places within a chassis that can give effectively and safely an ounce or more with good planning. I'm sure a lot of them have been performed and the norm here.

I suspect that there are a few hidden well conceived ideas still out there to be applied.
Why? I sometimes discover them by accident on my own car or squint and hiss when I see 'em on a F.A.S.T swindler. LOL.