It's not meaningless to the person who did it. But in the grand scheme of things, it has no meaning to anyone but what you attach to it. And expecting others to have that same level of meaning as you do is a very difficult if not impossible expectation to set.

As an example, I greatly value the Nidhogg weapons because that fight took me, personally, some time to master because I don't have much in the way of depth perception. This made the fireball phase nearly impossible. Therefore, I needed to make adjustments to the camera and really rely on muscle memory and such to discern the depth of the objects. I practiced and practiced that fight and kept improving to the best of my ability. Getting those weapons at the end of that fight was a sign of my personal victory and triumph.

Probably come the next major patch, these weapons will be craftable. They are now easily obtainable in the fight itself. Their deep and significant meaning carries something only to me and I'm not going to forget that, even if they can be made in the future with a few clicks.