Groups rarely say this.
They often (and loudly) state “we are right,” but when the future arrives, and it always does, it’s not surprising that it turns out that many projections and predictions turned out to be wrong.
When smoking was banned in New York restaurants and bars, the trade associations vehemently protested, insisting that it would doom their businesses. It turned out to be a benefit instead.
All we can hope for is for an individual to say, “based on new information, I’ve made a new decision.”
While it might be satisfying for a group to publicly acknowledge what they’ve learned, waiting for this is a waste of time and energy. The alternative is to help a person make a new decision instead.