Proof? Because the only evidence I see for its non-existence is a lack of explicit mention, if it's mentioned that the numenorians had literal bows made of steel I seriously doubt the concept in unknown to them.
Furthermore, the only people in the series that seem to be mentioned on multiple occasions are always either Ranger's, Rohirim or people that are traveling who can't be bothered to weight themselves down in plate.
Your argument boils down to "Steak is never mentioned explicitly in LOTR and thus it doesn't exist even if cows do."
Which is bull because in a world where there is craftsman of The Numenorians, Dwarfs, Noldor, Sauron and Aule who made everything from Steel Bows to the Palantir saying they couldn't think or fathom of something which could be as simple as this is disengenous.
Also having plate when others don't is an automatic win condition in any case.
Second their is no explicit mention of this being either the book or movie canon by the OP so I can draw from whichever I choose especially in instances where one source fails and the other provides.
No, they are just rampaging marauders who happen to be the product of the first Dark Lords desire for subjects and foot soldiers the fact that you are pointing to a perfectly coordinated surprise night attack against them by a Badass like Eomer is proof enough that you don't have a leg to stand on.
The above is a depiction of a Medieval French Levy they are a hodgepodge of farmers impressed into were put into service with basic weapons and from there they scavenged whatever they could armor wise from fallen enemies.
Gondor and Rohans armies are much better armed than that and have faced things like Trolls and Olog-Hai things that Westroes doesnt deal with on a day to day basis.
Thats a lot of supposition, Orcs seem more likely to throw themselves into a meatgrinder than peasants and much more likely to be better armed and armored overall because their society literally revolves around pillaging as opposed to farmers being pressed into service.
The thread isn't for you rambling in general, it's a place to shove all your derailing post about Germans/Nazi's involving Poland as long as you don't bring the subject up and cause a derail nothing shall be put there. Is that understood? Good. Because this isn't a place to talk on that subject.