#basically because

@bigoltrashpile

Okay, so I was gonna post this in an Ask but like...there was no room and this was turning into like four Asks, so I tagged you instead because I HaVE fEElinGs about this lol

I see everyone discussing why humans be so weak and my general thought is two part. The first being fairly important, they don't know. As far as it looks, the war was soooooo long ago, no one remembers. How would they know they could beat the monsters?  Yeah, some probably try but even though canon says all monsters could barely beat one human (and yes the Soul does genocide at one point), the Soul dies a lot too. Via one monster. Not only that, I doubt most humans would know to attack with their Soul magic, they’d probably use guns, etc, and whose to say stronger monsters can’t defend against that because no matter what I equipped playing, it took me awhile to not get my ass kicked, and that includes a No Mercy and Genocide run (which I never finished because Undyne is ridiculous. RIDICULOUS). To me it stands to reason they can defend themselves.

Second part, not all mages are equal. It says the seven strongest sealed them, so maybe not all Souls are equal which would mean some human Souls can be beat. And I’d like to think in the darker verse, monsters have 100% consumed human Souls, why wouldn’t they (and it says in Canon that Asgore took a human Soul in so like, there’s that)? Whatever they need to do to defend themselves from humans and even each other. Since we don’t actually know too much, I would even go with humans have weakened over time and only the strongest Mage descendants were able to go through the barrier. 

Another weird thought, is if humans still had magic, why aren’t they using it? True, we don’t actually know about the current world outside the barrier but I would consider it the modern age, so to speak, since it says 20xx. So, maybe the magic has died out, maybe the only way for humans to use magic is in the barrier and once broken only monsters (creatures of literal magic) can still use it. Hence why the humans kind of fall in line and are scared after, and why in many interpretations Frisk loses her abilities once the barrier is broken.