The wobble is a neurological disorder that is characterized by, what I consider, a difficulty centering themselves. The wobble is only really manifests themselves when their head is not on the ground. When the head is on the ground, you wouldn't even know there was a wobble. It comes with the spider morph and is not a result of inbreeding nor can it be bred out. As others have pointed out, the severity varies from snake to snake. Regardless, the wobble has no known ill effects other than it makes feeding a bit hard sometimes. Snakes with a wobble will still thrive, eat, poop, shed, and breed like any other ball python. The original spider was thriving in the wild and as we all know, the wild is the most unforgiving place there is. The wobble has no ill effect on the snake and anyone who tells you otherwise has an opinionated view on the spider and the wobble. The facts are there and surprisingly a lot of people choose to ignore them because of their own opinion. Given, this entire rant is also my own opinion but I like to think it has roots in facts. XD
Some education on the spider gene and its wobble.