It's a classic way of sweeping problems under the rug. Imagine you're a cynical politician.

A school shooting happens. You don't want to ban guns. So you say "switzerland doesn't have this problem, we need to address the mental health issues that are driving these young men to kill" as a distraction. Nobody's got a workable plan to do that, so you do nothing - which is what you wanted to begin with.

There are lots of rough sleepers. You don't want to build more houses. So you say "many homeless people are estranged from their support network by mental health issues and addiction, we need to address this underlying cause" as a distraction. Nobody's got a workable plan to do that, so you do nothing.