And dick used to be short for detective, and used by private investigators like Dick Tracy. Then there is the implied Dick pun, like "Magnum" PI, where Magnum is a "Big Dick"
Wasn't a detective written as dic without the k? Clearly, the k was going to be used because everyone's inner 12 year old
Also "dic" just doesn't look like an English word - compare kick, lick, sick, tick, etc. There are English words ending in -ic but they tend to be longer, Latinate ones.
Epic mic drop there.
OK, that's actually a good example, but "mic" is a clipping of "microphone" and isn't pronounced the same anyway.