I think this is a really good point. I haven't owned BPs for very long, but upon first getting into them, I was bombarded with a ton of information about how "bad" the spider gene and wobble are for BPs, complete with informational videoed with sad background music. This was alarming, because spiders were so accessible and immediately became my favorite gene. I read some more and found varying opinions on the gene, and finally decided to go ahead and get one for myself.
I have a very happy spider enchi ghost who rarely wobbles, except when striking at his food. Like Jordan points out, it's easy to tell that he is because of the lack of wobble. My other BPs just sit there, so Whiskey is a nice visual reminder that I'm doing pretty well by them.
Also, I understand that an animal behaving erratically is usually alarming, but I've been thinking of wobble as similar to the disorder in cats and dogs that causes them to be unable to balance. There's plenty of videos showing that these animals are healthy and in no pain, they just fall over a lot, especially when excited.