Why make a good looking Minecraft skin if you hide it under a Diamond or Netherite armor? Why need to choose between armor for survivability or no armor for cosmetic? Now you have a simple solution to your problem.

This pack hide the armor texture on your wonderful Minecraft skin, yeah that just that. Item of armor still visible of course.
Sure you can make it yourself, that's easy, but why taking 5 minutes when a ressource pack is already avaliable :3 ?

Not Optifine required, this will work in vanilla, will hide all body armor from leather to Netherite
Optifine don't allow selection by mob so I can't make it only for players, or I'm just an idiot and I didn't saw it

This pack won't work with modded armor, it won't affect Optifine custom armor if you use another texture pack, only the base texture is impacted.
I don't know wich version of Minecraft is compatible or not (except 1.18.2), if a version is not compatible, send a message, ignore the warning