There are no good arguments for rng driven gameplay. It's a preference.
Simply untrue. First of all, it's not a true preference; it's a "preference" in the same way gambling is. It matters very little if you claim to enjoy gambling or not - unless you're functionally abnormal, you're pray to the same drives and triggers as everyone else.
RNG is about tuning things to a level where the RNG matters, and gives you ups and downs, preying on your basic psychology, but where it does not completely determine the outcome (or is perceived as such), wherein the gambler/player feels cheated (and stops playing).
It's a very basic and foundational concept in game theory, and for whatever reason, Larian have completely missed it. It's really quite strange, and I wonder who was behind it. Larian are no amateurs, but the armor system "as-is" is amateurish.
This strong veering towards reduced complexity is very odd, and it's consistent throughout all the things cut or systematically stripped, whether we're talking the attributes, various sub-systems (or lack thereof) or the armor system.