"Well, that's your opinion...". One of the reasons this whole thread-topic gets so murky is that there are (as well as facts and opinions) a whole range of considerations people can have in between, such as second-hand facts, opinions communicated as though they were facts, altered facts, and all the inaccuracies and overlays and alterations the human mind is heir to.

Then there are things which may exist in fact but, being a bit out of the scope of hard material events, are hard to identify and agree on -- facts which can't be readily measured and thus not agreed on. There's a whole range of experiential facts (i.e., things that really did happen) which get thrashed as opinions because they aren't as common as physical universe things.

A person of any age could well have a better grasp of these, just through personal insight, than any old fart no matter how scholarly. And sometimes the reverse is true. This is not something open to sweeping generalizations. "In my opinion."