I am in a dilemma. You would have thought that the exorcist world would be more advance than the normal human world, right? For one, we are literally chosen to protect them. We have 'magic,' and, probably the only strong and useful evidence, we have magic. Maybe we don't have ramen but that's because we don't even try to them. So, this is just my suggestion, why not build a car, hm? Why not stop the torment our ass would have from riding a cart? And stop using horses and, in my case, oxes.
But exorcist are a proud culture—tradition is everything. So these suggestions don't even stand any chance of being even considered.
After living in the modern world for so long, I had to say, in term of convenience in person's life, they do best.