@ CMF Pseudo-random chance is reflective of reality. Video games and D&D are simulations of reality(I have already sourced this proof from the introduction of the PHB mind you before but I am happy to do it again) and therefor that which is a better reflection of how mechanical issues work in reality is superior and better for the efficacy of the simulation.
I don't have much to say about your second point as I haven't read anything but evidence is kind.
I clicked the link and read a bit of that wiki for dota, I didn't notice the passage that explained how it is reflective of reality when it is manipulating chance by reducing the odds you will fail. Reality does not have a hidden system that will assist us in getting a result with pseudo-random chance. I do see how this would make for a more enjoyable game experience for some players though who don't like to see "miss miss miss".
