He's saying that fantastical elements in WRPGs tend to be more "grounded" than equivalent elements in JRPGs. He brings up Mass Effect because it has one principle - the titular Mass Effect - which doesn't fit our current understanding of physics. Everything else is very seriously researched and painstakingly crafted to be realistic within a science fiction setting. It's not hard science, exactly, but it's as close as you can get with FTL travel. Everything in the game's universe, from its AI dynamics to its doomsday scenarios to the logistics of interstellar war isn't realistic so much as it is plausible and justified.
I can't think of any sci-fi JRPG that goes to the same lengths to make its sci-fi elements grounded in reality.
There's nothing wrong with what this guy is saying.
