No, because that requires the development and maintenance of two different operating systems, the cost of which is then passed to the consumer (me).
And I 100% guarantee that the piece of this 30% pie is way bigger than the effort it would require them to divert their development like you're suggesting.
EDIT: Oh, and I also bet their lawyer bill for fighting this is bigger than that too. :)
And if the argument has become about security, as others have said, Jailbreak has repeatedly relied on security issues, so the security problems have always been there.
But making the argument that Apple is the only company to solve secure payments on the internet is silly.