When the ozone layer was being depleted, did the scientists sounding the alarm say that it could be healed in this period of time? Honest question. If not then your father might be reacting to doomsaying that turned out to be overzealous.
At the time there wasn't much focus on timelines (besides being a long term undertaking), only that there was a hole in the ozone layer and that it could be fixed by avoiding certain refrigerants. As they were taken off the market the progress in regulating the CFCs and the ozone layer healing was noted, and it faded away as a concern.
At the time I lived under said hole, so it was in the news quite a bit.
