Well the "Defund the Police!" movement didn't exactly seek the Democrats approval, nor did Black Lives Matter. The Dems tried to walk some of the language and goals back, but never replaced the messaging with something better. They are pretty awful at that. So many opportunities, so many simple ways to say things better. It's baffling.
We do know that we're not talking about a short, pithy explanation of the actual policy, right? We are literally talking about the three word catch phrase that sticks in people's brains.