I can't really imagine being all that put out by somebody getting the chance at something I had already gotten during a limited time event. It doesn't impact me at all. It doesn't take away from what the thing or the limited event was.

Something being "limited edition" and then released again doesn't really change the sentimental value of the thing. Maybe the monetary value, but we're not really discussing any sort of monetary value attributed to the item in this case. Only that the item now "means less" because it's available from a different event.

The item that legacy players have still has the same meaning to them, it hasn't changed the sentimental value. And new players having access to the item from a different event simply means that the item has an entirely different sentimental value.

If your appreciation is devalued because someone else is able to appreciate something differently, maybe you're attaching too much significance to material goods.