The silencing of anyone's voice is not really a good goal, even when as in this case, it's self-silencing. That said, is the retirement of Dr. Laura an occasion for great regret? Not really.
She always appealed to--and eventually aimed straight for--a conservative talk-radio audience. No surprise there. Under "government off our backs" there's usually a whole lotta busybody. That's not really the issue. True, she alienated gays and lesbians with clueless gusto. And true, she ended her career with a bizarre racial meltdown. But these are sidetrips.
What made her really not-so-helpful was the finality of her advice. When people called her, she didn't help them think through their problems and moral dilemmas. She just told them what to do. And even if her advice was good--stopped clocks and all that--giving answers without a way to get there doesn't help. You can't always carry your favorite radio host around.
Then again, there seems to be a market. Maybe people don't want a friend to talk to. Maybe they actually want a visit from the morality police. In which case the next Laura Schlessinger is on the horizon.