In context, they are clearly saying that beginner cyclists should not have to panic stop because it is exceptionally rare, as evidenced by their 14 years without needing to do it. It is extrapolating from their singular, personal experience to general frequency for the population. It is equivalent to saying "people shouldn't worry about breaking bones because I've never broken a bone." Even if you qualify the statement by saying "maybe someone out there has broken a bone at some point" you are still making a statement about it's rarity that can not be adequately supported by your personal anecdote. Having multiple people in a single thread which has been viewed by a few thousand people at most who have counter examples should clearly indicate that "it hasn't happened to me" doesn't equate to "you shouldn't expect it to happen to you."
Maybe I'm more charitable in my interpretation, but I don't really see grandparent making a generalization, they're giving a counter-example to requiring everyone to practice panic stops.
His and my reply assert that panic stops are not a panacea of avoiding traffic problems, but a side-effect of not paying more attention.
And cheers, this is my last clarification. I don't enjoy engaging with such excessive pedantry.