For real is there some unwritten rule among devs of this type of game which states the higher "level" the weapon the more absolutely ridiculous it has to look?
The answer seems to be that some people are willing to pay even real money to get as much of a light show on themselves as they can. Like in guild wars 2, some people try their very best to replace the sun with all the infusions and other ridiculously glowy stuff they can stack on their character, since the armors work the same way the weapons always do. You know, wear armor that glows like a christmas tree with infusions to blinks like christmas tree decorations to show the enemies were a "sneaky" thief is hiding and then hit the enemies with a weapon that glows like thousand suns and throws, yes, glowy orbs that exlope like nukes to blind the player using them and the entire map besides. I admit this is slightly over the top, but i'm sure everyone gets the idea. I don't know why, but i can't come up with any other reason since it seems to be a staple of all MMOs and games that have any kind of multiplayer.