Simply put, the defund the police slogans are damaging to the DNC outlooks in November and three major unions basically read the riot act to the DNC and members in Congress that no talk that can come back to collective bargaining being a reason police get away with so much abuse is allowed. Instead it must be that they lack training, the security of their pension system raises anxiety among the forces, and lack of officers incurs overtime furthering anxiety. So the only solution is more money for training, propping up their pension systems, and more money for community policing.
just put it this way, when that was dropped on me from a relative as their new marching orders I thought they were joking.
tl;dr the whole defund the police calling is poison in November and the big influences in politics has called their party to the carpet to change the direction of the debate