Amber provides a non-gil method to obtaining accessories which would otherwise be tougher to obtain to be a high enough IL to do the endgame dungeons. Nothing more nothing less, people don't understand how useful it actually is for hitting 60 if you don't have any other means of hitting that il 145 cap for doing the 2 endgame dungeons.

Yea, gear is easy to obtain from the left side via dungeons but on the right side it is a tad trickier. You might think nothing of it because you are past that point but personally it helped me out when I needed that extra IL to do the end game dungeons.