And why should they?
Think of it: in reality, what is the future of "scanner hobbyists"? Not only are the police restricting monitoring of their systems (and, rightfully so), but most other public service operations are, too. And those who are not may well be on the verge of buying into the next generation of proprietary systems developed by the "named" radio manufacturers. And we really don't know what those new proprietary systems will be. Will they be too expensive to put into a scanner, boosting up the price of the radios far beyond what a "hobbyist" wants to pay (and if the manufacturer even license access to the system) for a very limited amount of monitoring, such as school buses and store security?
As I said elsewhere, don't expect Uniden, or anyone else, to put too much future effort into their radios. I'm sure they have other products worthy of their efforts which don't have such a narrow market.
There will come a time, very shortly, that, if you want to monitor an agency, etc, you're going to have to belong to the agency (paid or volly) and hope they issue you a radio. And, even then, with limited access.
Those who are beating a drum thinking that they have a Constitutional right to monitor anything are wasting their time.