Well, you say "We" as if I am a part of that group.
I am not.
And, people do that only to sell to people that like that particular trait.
In Spiders, I don't see people running out and buying the most wobbly animals out there cause its cute.
And I agree with John and Trevor. As much as you may want to do it, Spider wobbles seem to be a crap shoot. You get it sometimes from some animals. It's never a guarantee that wobblers produce wobblers, etc.
So there you go.