How to feel about the ethics of the spider wobble?

[bcr229]

...has there been studies that show this neurological defect doesn't cause pain - only difficulty with equilibrium?

In animals loss of appetite is a sign of ongoing pain and/or stress. Since the snakes eat - and face it, a butterfly flapping its wings in Africa can cause a month-long fast in a ball python - I'd say that the wobble isn't physically painful to them.