Cunt is considered the most OFFENSIVE word in the English language, a vulgar, abusive word, "a nasty name for a nasty thing."
For me it's a linguistic illustration of how much we culturally despise vaginas, vulvas, and the people attached to them.
If the WORST insult someone can give to the object they regard with hatred and disgust is that they are vulva-like, what does that say about the way we view vulvas?
Cunts are majestic, life-giving, pleasure-producing, works of fucking art. Don't waste this high compliment on low people.