I love the fact that people are writing articles about whether armor in Baldur's and dnd5e gate[1] is historically accurate. I feel like you have to be really committed to miss the point so badly. It's a game. The point of the game systems is to be fun, not accurate. In fact dnd5e and Baldur's gate never makes any pretense of being historically accurate. Historically-accurate arms and armor might be fun in a simulation, but this isn't "Mount and Blade" we're talking about here.
[1] a world in which you have half-demons, dragons, vampires, magic spells, mindflaying dimension-traversing humanoids with tentacle mouths, people with magic artifacts embedded in them and primed to explode etc
[1] a world in which you have half-demons, dragons, vampires, magic spells, mindflaying dimension-traversing humanoids with tentacle mouths, people with magic artifacts embedded in them and primed to explode etc