Your post title says "ART"
Interesting you worded it that way, I don't think I would go that far to say art ....but there are some that have mastered the craft or ability to clean carpet.
I will say this not to long ago my TM broke down in the middle of the job, (voltage reg went out) so I jumped into my van B-lined to the rental yard where I picked up a awesome R2 D2 looking pos unit, it did have 2 cords for what ever reason so I plugged them in and turned on this powerful beast of a machine.
I did somehow hook a piece of my 2.0 hose to it and used my PC Quad wand with a hole
glide. Now I did all this because I was sure the pre spray was going to eat the carpet fibers up if I left it in there.
The amazing thing the carpet came out fine, it was slower than pouring molasses on a cold day but I got the job done and nobody knew any different??
So you tell me, why is there guys that can't clean with a # 3 #4 #5 blower machine?
Why can some play golf at top level but others can't maybe it is just this way so that this industry like in all other things in the world there are some that make it to the very TOP LEVEL ???
I am not saying I am at the top, I am just your average hard working/golfer hacking his way through life