Would you consider the distribution of a secret recipe, obtained via unauthorized means, as theft, given the potential blow to the business of a restaurant famously known for said recipe?
What difference should that make to whether it is theft or not?
Presenting the matter in terms of a trade secret, instead of bits that are otherwise legitimately available (albeit for a price) is an interesting twist (regardless of whatever financial impact it may have).
I still don't see it as "taking something away from someone else" theft, but (for reasons I haven't quite sorted out) it does seem different from making the latest released Kid Rock opus available on MediaFire.
Maybe it's the privacy aspect. If someone obtains my or your private medical records and posts them on Wikileaks I'd say it was immoral. Whether or not it's technically theft would not be the issue; it would be just as bad if my own doctor decided to do it.