Diablo progression is just beating a pinata until it pops. You do the same thing over and over again until you get the outcome you want. It's about as intellectually engaging as cookie clicker.
Every new ARPG (or ARPG league) requires many hours of grinding regardless of skill.
Anyway, my point is that they can look different in the surface, but they are not truly very different. They are just a pastime.
To each their own, but it strikes me as a squandered opportunity.
Rolling dice is obviously a reduction of the Diablo gameplay. Just because you don't like the mechanic, doesn't mean other people don't find it better than a skill based game. The skill in question is pressing a button quickly when something happens on a screen. Which is the only real challange of any dark souls game. Both are fine distractions. But it's very obvious that one is not objectively superior to the other in any way.
Again, I don't think dark souls is the emblematic, archetypal, or only direction for artistic video game design by any means. But it's at least something. From the lens of challenging yourself or exploring art, diablo has nothing for the majority of it's playtime in end game where you've seen everything and are just thinking about the numbers imo.
That's not an objective view, but man it sure seems underwhelming otherwise.