You obviously know very little about hot water extraction, modern cleaning chemistry, or carpet cleaning in general for that matter.
Please take an IICRC class and quit spreading rumors and using scare tactics in your marketing.
Nothing wrong with VLM cleaning methods (Very Low Moisture) as I employ them in my cleaning business. A true professional offers more than one method. Each has its strengths and weaknesses and a trained, skilled tech will know when and where to use each. Each method is only as good as the technician performing the work.