People like to find all kinds of reason to justify wfp.
Simple answer is NO.
If you think it is great not to use detergent, compare how much DI resin is used by the average operator and that is without all the other environmental costs (water, waste water, filters, broken down pumps, poles hose and all the other extra equipment).
There are environmental costs to trad but IMO not nearly as much.
I use wfp but do not try to make up reasons to justify to my customers.