Yes. We must go through these complex procedures in order to restore the Great Hakurei Barrier back to normal.
I see, so it's like the Uho ceremony in terms of Onmyoudou. 禹æ©(Uho): ceremony performed by a sorcerer to protect a noble setting out on a trip.
There's that too... but more importantly, it's more accurate for us to walk on the predetermined path that run parallel with the Ether vein.