The police’s top priority is to “go home safe”.
There is no reason to rush into a crime in progress and risk their lives—especially when they know the local police chief and district attorney does not have their back.
This is called the “Ferguson Effect”—and every “respectable” scholar on the planet denies its existence.
The “experts” are blatant liars and frauds.
“There is no reason to rush into a crime in progress and risk their lives”
That is often reasonable but the police’s job is to help the victims and catch the perpetrators. Businesses that are too frequently victims will take their businesses elsewhere. On a large scale that is disastrous for a city.