system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU/Doctor Strange] So the individuals at Kamar-Taj protect the Earth from mystical threats while the Avengers from more physical threats. What’s the true difference between magic and science? Wouldn’t the line just be arbitrary?
gpt
it is, Thor flat out says that we treat them as seperate things but his people dont distinguish a difference.

Why the kamar-taj folk are so reclusive (and secretive with their art) has to come down to the original motives of Agammoto (who could have been an alien and not wanted the vast jump in power he was introducing to the world (by teaching folk mandala-magic) to disrupt history or get the notice of asguardians or something). 

We know that he had excellent mastery of the time stone, so could have been trying to sculpt a particular future, and we know that asguardians saw themselves as protectors of Midgard in the past and would likely react poorly to some rando alien uplifting them, so both are possible reasons to create a hidden culture.