I see where you're coming from, but I doubt the finance industry is worried that they're going to be put out of business - if anything, right now they view Bitcoin as another source of revenue. There have been a lot of inventors that have killed off much bigger businesses, and I can't think of any that wanted to stay anonymous.
Oh, I don't think the entire industry will be. There's a large class of necessary & billable activities that the blockchain doesn't impact. But transaction / settling fees aren't zero revenue either.
The more immediate explanation was probably "he or she or they knew the first use was going to be facilitating illegal transactions and didn't want to be associated."
