I would love to get some examples on how "life experience" in general is necessary for an informed and rational opinion on a subject. The examples in these comments seem to relate to not "life experience" but specific experience (i.e. doing tracings, playing chess, etc.) Yet people seem to think that "life experience" in general adds "something" and that further conversation on the subject cannot substitute for it.
As someone whose peer group is generally much older than me, I can say from comparing myself to others that "life experience" doesn't add to your knowlege or intelligence or mental development, past a certain age. What it does add is context. As you get older, your context shifts--certain things that you thought were important no longer are important and certain things become more important. I think it's explaining this context shift that is so difficult (but not impossible!)
For instance, my younger self had serious worries about her relationship that now seem trivial. This is because I've learned that communication and trust are much more important to having a healthy relationship than physically being close to someone. And this context shift comes from simply life experiences in dealing with people.
Sports... That requires a form of Life Experience in order to gain an informed set of opinions on the subject.
When playing something like Soccer/Football, the basic skills may be imparted through training, yet the ability to successfully play with others on a field is going to take experience in learning how the whole of a team interacts both with you and against you (speaking in third person).
Another area where I understand that Life-Experience is not to be communicated is in the field of certain types of military, paramilitary or intelligence gathering a...
Sometimes in an argument, an older opponent might claim that perhaps as I grow older, my opinions will change, or that I'll come around on the topic. Implicit in this claim is the assumption that age or quantity of experience is a proxy for legitimate authority. In and of itself, such "life experience" is necessary for an informed rational worldview, but it is not sufficient.
The claim that more "life experience" will completely reverse an opinion indicates that the person making such a claim believes that opinions from others are based primarily on accumulating anecdotes, perhaps derived from extensive availability bias. It actually is a pretty decent assumption that other people aren't Bayesian, because for the most part, they aren't. Many can confirm this, including Haidt, Kahneman, and Tversky.
When an opponent appeals to more "life experience," it's a last resort, and it's a conversation halter. This tactic is used when an opponent is cornered. The claim is nearly an outright acknowledgment of moving to exit the realm of rational debate. Why stick to rational discourse when you can shift to trading anecdotes? It levels the playing field, because anecdotes, while Bayesian evidence, are easily abused, especially for complex moral, social, and political claims. As rhetoric, this is frustratingly effective, but it's logically rude.
Although it might be rude and rhetorically weak, it would be authoritatively appropriate for a Bayesian to be condescending to a non-Bayesian in an argument. Conversely, it can be downright maddening for a non-Bayesian to be condescending to a Bayesian, because the non-Bayesian lacks the epistemological authority to warrant such condescension. E.T. Jaynes wrote in Probability Theory about the arrogance of the uninformed, "The semiliterate on the next bar stool will tell you with absolute, arrogant assurance just how to solve the world's problems; while the scholar who has spent a lifetime studying their causes is not at all sure how to do this."