Extra finger...help or hindrance?

I laughed when I looked at the photo in the ā€œlearn moreā€ section of the C chord lessonā€¦there is a photo of Justinā€™s handā€¦it has 5 fingers. It is obviously not a real photo of his hand but it got me thinkingā€¦would an extra finger be a help or a hindrance?
Also, the photo is not of the ā€˜C chordā€™.

Iā€™d be happy if my little finger was just a wee bit bigger.

Hound Dog Taylor had six fingers on his fretting hand.

His most famous quote: ā€œWhen I die, theyā€™ll say ā€˜He couldnā€™t play shit, but he sure made it sound good,ā€™ā€

This caused me to look into Hound Dog a little more, and found this. It may or may not partially answer your question.

ā€œTaylor was born with polydactylism, a condition that causes the formation of additional fingers or toes. Both his hands had six fingers. Although the sixth wasnā€™t functional, his fifth was extra-large, and some theorize that its additional bulk and strength may have helped him more aggressively pin the strings with his slide.ā€