spiders have a neurological defect. i have no idea why they're so popular. they are very pretty, but there are hundreds of pretty ball python morphs/combos that don't have genetic defects, however benign they may be
a head wobble that doesn't seem to effect the life of the animal is still a defect. the only reason these are bred is because they are attractive and make pretty morphs. if a spider looked 99.9% like a normal but was nonetheless phenotypically discernible they would not be bred. they're bred because people are willing to sacrifice genetic integrity for attractive snakes, and there is absolutely no disputing or repudiating that.
my snakes miss as well and they're not spiders