The defund movement, by and large, is about shifting some money and resources to other organizations that are better equipped to deal with the mixed roles cops are expected to have. Leaving cops to do normal cop shit like dealing with violent crime and such. It came from people co-opting the "abolish the police" movement, which I personally prefer since "defund" thinks cops can be reformed, and "abolish" thinks the current system of policing is beyond reform and we need to eliminate police altogether and structure a better means to address the problems cops have historically had in their jurisdiction.