if you are OK thinking about the family that has to live in the stuff you leave behind after encap, you can get away with it
I never really thought about it like that until I had a few accounts that ended up with the "black sock effect"..... yukkk!
Maybe consider a family that has a child with allergies, or a baby that has started to crawl, they call you to CLEAN a carpet for their children's health and what they get is somebody just spreading the soil around, maybe liberating all the little nasties to the surface of the carpet where the real damage is done. Unfortunately, since the carpet looks clean, it's OK for baby to suck drool from the floor.
Stick to the TM and sleep better at night.