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[MCU] SPOILERS! So about Magic, technology, Asguardians and the Sorcerer Supreme...

In the beginning of Dr Strange, the Ancient One comments on the fact that the Sorcerer Supreme combats Magical threats to Earth, and leaves physical threats to normies, formerly SHIELD, and now the Avengers.    
    
But in the MidCredit scene, the Sorcerer Supreme is questioning Thor about the danger of Loki, to which he replies he's handling personal business.     
    
Is this not a physical threat?    
Asguardians are supposed to use advanced technology, not Magic.   
So does this mean that Asguard uses both Magic and Science, and unlike what we previously thought, is Loki a magic-user?
gpt
One, Strange isn't particularly bothered by what is and isn't his role. Sure, his pals tended to focus on otherworldly consciousnesses that sought entry to our realm in order to devour our shrieking souls, feasting upon our pain in order to fuel the forges of cosmic misery, while the Avengers and such dealt with hordes of aliens and large monsters than punch things very hard, but what's the point of being the fucking Sorcerer Supreme if you can't write your own rules from time to time?

Strange considers Earth in general, and New York in particular, his domain. If something encroaches upon it, particularly something on the level of Loki, who already nearly destroyed the earth once, you can be damn sure Strange will take an interest.

There are plenty of people who can deal with alien armies, but only one relatively small group, the Kamar-Taj, who can deal with reality warpers. Strange is confident enough, or arrogant enough, to believe he has the resources to deal with *both*.

Two, the line between magic and technology is intentionally fuzzy in the MCU. The Ancient One told Strange that the magic he was learning could be considered code rather than spells, techniques for rewriting the operating system of the universe. Magic still has laws and rules and implements, just like Tony's arc reactor or Thor's hammer. 

The primary differences are the medium, the knowledge of the inner workings, and occasionally, the sentience behind the effect.

Tony's technology deals exclusively with physical constructs. He basically built a battery. It's a really good battery, but it's still a battery. It's made up of stuff you can find on earth and assemble in a cave, if you're smart enough.

Thor's technology deals with stuff that we don't have the means of manipulating yet. Materials forged in the hearts of dying stars and contained effects of quantum systems.

Is a hammer that can summon lightning any more magic than a fist-sized device that can power an entire building? What would a man from a couple of hundred years ago think?

The medium of the Ancient One is ... the soul? The astral form? Our minds? She teaches her disciples to manipulate a thing that neither Tony nor Thor have access to.

The knowledge is also fuzzier. Tony knows his arc reactor intimately. Someone forged Thor's hammer, and it could theoretically be done again, if you had the blueprints and the means. But the Ancient One's disciples don't exactly know *why* their spells work, they just know that they do.

Finally, the Ancient One's magic sometimes involves invoking a sentient entity in order to accomplish a feat. Her long life isn't because of a spell she worked, but because she tapped into some *other* entity's magic, or technology, or whatever, in order to extend it.