maybe because noob photographers are still so attached to what they make, because they have not made a lot of great photos, and they still feel they're learning, therefore they become more attached to what they do or have made, at least
that's what i felt when i first really got into photography, now i don't really hold much attachment at all because it's just another photo in a long line-up
not that attachment is a bad thing, but it's just like in drawing classes where everybody just loves the line they put on the page, they're too worried about what they do put down, than what they could put down... and you don't really make progress until you've detached yourself from the line, and can then go back and make corrections or be more free with it in the future
the results are noticably better, but something i hear a lot freshmen art students say all the time at the beginning of their first classes is how much art they've done in the past, how creative they are, and when they do a drawing early on, how great it is... even though in a few months down the line, they'll be looking back and saying how gawdawful that stuff was, and that usually is the case