>>301948293
Basically this >>301948856
It's this weird fine line they're trying to find that makes them stand out enough while having the avatar not be too obnoxious to the point they get blocked too much.
Honestly it's just something you have to get used to. It happens to normal MMOs as well, with flashy cosmetic items and armor. Since it's a social game with no equipment/stats, they just copy clothing/trends from real life. I would not be surprised if the same trend reoccurs in the future when body modification allows people to have genetically engineered fluorescent body parts.