It depends on what you're taking pictures of. A lot of people seem to snap pictures of landscape, with or without other strangers in it. Those are the kind of pictures that aren't really durably interesting over the long haul. For well known places you can always find a pro who did a wonderful job capturing it. Now, if you're taking pictures of yourself and/or your friends, that makes perfect sense to me. As long as it doesn't get in the way of actually enjoying the experience.
Landscape pictures can serve as a reminder of what you were doing, a sort of diary. Sure, you could find professional photos, but they won't be as rooted in your memory.
By looking at an old photo you remember where you were, what you were doing, and _why_ you decided to take the photo.
In other words, while a pro may be able to capture the location better, they won't capture your memory of visiting it as well.
This is a matter of taste; I'd much prefer taking and remembering landscape pictures most of the time. I know who I was with, and I don't want my face in frame spoiling the view.
The difference between a pro photo and my photo is that I own my photo and know exactly where and when it was taken.
While I also question the necessity of having every single moment documented and framed, I don't think you or anyone else has the authority to decide what's worth capturing and what isn't.
My wife is of a similar mind. She is so beholden to the idea that everyone is a perfectly unique snowflake that she thinks all generalized experience, observations, and advice are completely irrelevant. She may be right.
