MP100 does such a good job of committing to its theme that psychic powers don't make you better than anyone else. It's really common for media with magic or superpowers to pay lip service to the idea that the people who have them aren't any better than the people who don't, but then have their actual plots constantly undercut that message.
But not Mob! It takes its non-powered characters seriously; Mob's time with the Body Improvement Club and his friendship with Tome and the other Telepathy Club kids are just as important to his character development as any big psychic battle. On multiple occasions, Reigen's big contributions happen specifically because he *isn't* psychic--I'm thinking of the Shimazaki fight and the scene where he realizes Minori is possessed, but there are others.
And even when there are fights, they're ideological as much as they are physical. That's why Mob defeats Serizawa with an offer of friendship. That's why in the confrontation with Dimple in broccoli arc, Mob wins by *giving up* his powers, recognizing that they were preventing the two of them from actually talking. And that's why the thing that stops ???%'s rampage isn't another psychic; it's Reigen finally admitting to his own powerlessness.