I agree and thank those for the rational reply that regular weapons other than perhaps some melee would need either none, or almost no repair whatsoever.
I don't know how the OP battles, but if there was a more realistic system there wouldn't be any damage to the armor of the enemy I saw that had the armor I wanted, I just wouldn't be able use the helmet. The OP also admits it's also one sized fits all, so they admit it's not realistic.
There are tons of things that aren't realistic in Fallout, and things in the past that have been removed that were accepted that were also not realistic.
If people played Fallout 4 like a video game, and some of us do, all we'd hear was how great it was to play.
I sometimes wish they'd bought the I.P. so they wouldn't get sued and then pulled a Blizzard WOW move and tweaked the world just a little so no one could harp about how it's not what they think it's supposed to be, when the truth is that it is what it is, and since they do own the I.P. what it is, is whatever they want to make it.
I mean just think of all the pain Blizzard would put up with having to suffer hearing about all the things they didn't get just right about the Chaos Marines, or the Tyranids if they hadn't done what they did with Warcraft and Starcraft.