mati:
That is one advantage of the challenges: You don't see that everything is already said much better by others.
Quite true (AFAIC)...
As a writer, it's enlightening to read a number of effective 'first comments,' which all were uninfluenced by any other commenters' opinions and analyses.
As a commenter, you have that virgin-looking box for comments, even if the story's been posted for two weeks already and there are actually twenty previous ones that are hidden at the time. It's interesting to find out if other commenters came to independent conclusions similar to your own--or perhaps not.
But I wouldn't worry about other commenters having 'better' comments--if yours were truthful (from your perspective) yet tactful (if necessary), IMHO that's what matters...

--C.K.