Shouldn't Black Hole badges have unique images?

After ceasing my activity on the Help section, I have stumbled upon a new question:

Most Meteorite, Moon, Earth, and Sun Badges (as well as multiple Challenge Patches) have unique symbols for their badge images.

But every Black Hole badge (whether it be Tesla, Maelstrom, Atlas, Artemis, Herculean, Galileo, or even Is Sal) is represented by the same image:




Why couldn't each Black Hole badge have their own image?