Anyway, the RPGness of Dark Souls is also related to the action part, as one of the things that are fun about this series is also the way different builds change the play style completely. As far as i understand, in Sekiro you have only one weapon and only one way combat works. In Dark Souls you can go dual wielding press a button awesome try hard, rapier/buckler pirate wannabe, big bonk, shield and board etc. Sure the move set of most weapons is pretty similar all considered but even a small variation between weapons of similar type can make a difference as your finger memory will struggle to cope at first. Like on one of my playthroughs in Dark Souls i picked the bastard sword instead of the claymore. Similar weapons, but different enough moveset that it felt like a fresh experience, at least as far as that went.
For the record, i'm not arguing about which way of doing things is better, whether it's best to focus on one specific style and tune it to perfection or whether it's better to have different styles (including magic etc) which by necessity cannot possibly provide the same level of refinement as focusing on only one thing would allow, i'm just saying that's one of the fun of this series and to say you might as well turn Dark Souls into DMC just because the game "was always about combat" is a wrong headed assumption, and to be honest i'm glad they went with the RPGness in Elden Ring, as it certainly seemed to "refocus" the series after DS3 (where it seems you were railroaded into playing a light roll, R1 spamming build).