Just like when they banned R12 Refrigerant, to this day they still only say “It Might” be harmful to the Ozone Layer. When I took my Test in 1995 they said IN THE TEST “It Might” be harmful to the Ozone layer. Not much has changed ALL LIES.
The patent was about to run out, which WAS going to be harmful to DuPont's bottom line. The ban gave DuPont a monopoly on its successor.