It's mainly home owners to blame for overuse and incorrect use of such products (as was found in the North American research as far back as 2005) and contractors just got lumped into the same lot and suffered the same criticisms. The main reason Canada banned it is because of the Dicamba and MCPA (which is the same chemical family as 2,4-D). Any lawnie or gardener worth his salt should know how to spray, what to use, and when, for specific results rather than a blanket spray with weed & feed but Kamba-M and similar sprays for broadleaf weeds contain the same chemicals so I wonder how long before we see a push here as well to ban them.
I think your comment about 'outright lawn death' is a bit extreme though.