Yes, let's have the art team focus on making 10 redundant items just so everyone can be a unique little snowflake.

Instead of, like, adding entirely new equipment, or new zones, or new monsters, or anything else that would be significantly more impactful in the game than having a bunch of same-y crap to make you feel pretty.

They already offer multiple colors of a lot of items to give people some flexibility, and frankly that's plenty. Dev resources are not unlimited, and people feeling pretty should be an INCREDIBLY low priority.