Academic papers such as your John Nash example need to be short because otherwise it gets too complex and difficult to understand,
and also the expected public (other mathematicians) will know all the background that's required to understand them. If you had to give a full explanation (ie the equivalent to a MandaloreGaming vid), that'd take way more pages
(at least I remember one university math teacher on that: "that high-level proof fits on one page, but you need to complete a bunch of calculus classes to understand what's written")
The expected public of a niche games review like this, is a gamer.
Gamers, especially ones likely to understand and be interested in this type of game. Are likely to have the background knowledge to know the basics.
For instance, he didn't need to spend a full 3 minutes expounding on the dichotomy and systemization of the magic and technology systems.
He could simply have stated, that magic and technology war with each other, and that this is expressed in the design of quests, and gameplay choices.
Specific examples are not needed. And the whole of the review is rather dragged down by the spoiler laden nature of it.
The goal of an honest review is to inform, not to over inform or attempt to replace the material.
That said, I do like Mandalore's reviews. I simply find this one, very overwrought and about half of it unnecessary to the point of boring me.