Nothing in the phrase "defund the police" says anything about any of that. It is the goal, but the slogan doesn't reflect that anywhere in any way. When you hear it, you think about the intended meaning, while the vast majority hears only what it actually says which is "remove funding from the police" and no one wants that.
Conservatives are fearful people and those against police reform took the opportunity handed to them and reinforced that very message: "If you let these liberals have their way they will make it impossible for police to protect you by defunding them". It's too bad because lots of people who would support reforms to police want nothing to do with any effort under the "defund the police" banner. No one wants a police force that doesn't have any funds.