I'm not entirely sure that this is worthy of a top-level post

It seems marginal to me. In its favor, it is an idea that should be said out loud. But it should be better supported.

I think this article would benifet from some real world examples of people playing the "life experience" card in support of a wrong position, or that "life experience" conveniently tends to support policies that favor those with lots of "life experience" at the expense of those with less. Or if, by some improbability, the "life experience" argument is only ever made in support of correct positions, then it would still be good to illustrate how a more detailed argument, entangled with the actual issue being discussed, is more likely to convince the other than an appeal to general "life experience".