It's not just the resting of the cigar itself, I promise. There are numerous other reasons why this advice is given time and again.

You could have simply had a poor example of that particular cigar, such as bad burn or off tastes.

The surroundings at the time of your first take at it could have contributed to the poor reception of the cigar.

But mostly, your tastes will change too. I've been smoking for a few years now, and what I like now, is vastly different to what I liked then. There are cigars that I loved when I was much newer at this that I simply don't find appealing any longer.

By all means, do what you want with the cigars in your possession, if you don't want to "waste your time," don't. If you want to take a second pass at what could be a good cigar, do.

Edit: Apparently @Hardheaded types faster than I do.