Well, modders can't do story addons as good as Bethesda does... with all the voice acting, scripting and the new locations and items alltogether.
Bethesda has all the time to create content before the game gets released... there is really no need to sell minor things such as weapons for money, after we've already payed for the main game.
There are enough companies that abuse their customers that way, instead of selling 'real' addons.
I'm just sharing my own opinion
I can totally see why many others want something else than I do.
And even if I were a console user... I still don't think I would pay money for armor or weapons itself.
I don't think micro-transactions belong into full-priced games.