'___' you guy... will never leave me focus on my exam... are you ? =3=
We have a LOT of characters powerscaled from beating Metatron or some other powerhouse but in Persona 3 it suddenly doesn't count because... ? It just doesn't count? Doesn't seem fair to me unless there's an explanation I don't know about? Just saiying you know.
*Super special final ultimate Facepalm* Okay pal, i will stop you there before you can go any furthur and humiliate yourself.
I though that anyone who entering the franchise would know the absolute basis of the Personas : They are nothing more than the mere manifestions of the user personalities that take forms of the deties in the Megami Tensei Franchise
They are NOT THE SAME as their True Demon counterpart. Heh, Joker was once make this clear

Yep, Persona =/= true demons
The Persona's power is based on the user's will, the stronger the user, the stronger the Persona,. Why do you think i even mentioned about Tatsuya's journey ? Because he had gone through his own journey and developes his power, developes his Persona power and show his result in the end of his journey
Am i gonna have to bring up the feats too ?
Even Tatsuya and his crew in the IS can move multiple planets just by using Fusion spell of their Personas, guess what ? They can SPAM that Fusion spell. But in the end, it wasnt enough to hurt Nyarlathotep, yep that's how hardcore Nyarlathotep is. And in Eternal Punishmen, the crew was able to beat up Nyarlathotep, make him accept his complete defeat. That's the result of Tatsuya's power in the end of his journey
While in P3, everyone just like "Yay ! the Moon is falling, we're all gonna die !". Heh, even with the UC, Makoto cant do much again Nyx, sealing Nyx is everything he can do. Yep, that's the best feat of Door-kun.
In general. Personas will NEVER touch the actual demons in the term of power unless they got their own power scailing from the actual deties like Izanami, Hino Kagutsuchi, Pandora, Nyarlathotep.