It does take many years (in the timeframe of decades) for CFCs and other ozone depleting molecules to reach a point where they do damage as it’s heavier than air. 2010 was only 13-14 years ago at this point and those gasses have mostly not made it up that high yet. We won’t know the full scale of the damage that this has done for another 5-15 years.

What we are seeing now is a separate event that had likely originated with excessive, high-altitude water vapor being blasted into the sky due to volcanic activity.

The only reason I can think of is to avoid diplomatic problems. When scientific reporting doesn’t make sense it is either due to ignorance or politics, and I doubt the ESA has an issue with ignorance.