I got extremely freaked out when I took my bee home and discovered the wobble. As others have said here... take a deep breath and realize it's fine. They thrive in captivity.
For mine I have found if he's wobbling bad it's usually because temps have changed, he's about to shed and I'm bothering him, or he's extremely hungry. I consider it a positive for me that he shows a clear indication when one of those things is 'off.' It got a LOT less pronounced once I got my husbandry perfect.
They're definitely happy and healthy animals and once I realized that, the spider debate was over for me. In another time and place, a similar behavioral trait would be bred intentionally all individuals. Take a look at a ferret and compare it to the wild version.
Look at domesticated dogs to see how humans have no problems breeding out otherwise negative traits for their own enjoyment. My St. Bernard is going to die at half the age of other dogs and I nor the breeder he came from lost any sleep about it. It's just what a St Bernard does. Spiders wobble. It's all good... and in this case the spider actually doesn't seem to lose any life expectancy, have chronic pain, or anything like that.
Can we raise the thread from the dead where the guy claims the spider wobble is a superior genetic trait and that spiders have evolved in the wild to catch birds using their head as bait, similar to caudal luring? I liked that one.