That's an argument to be made, but I don't believe that is true at all. Sending one car to check on the safety/welfare of one active threat seems an entirely reasonable balance of risk. An unverified active threat is not at all the same as a confirmed active threat. That should be obvious simply by the existence of "swatting" as a common term and act these days.
It is not the duty of police to protect people from eminent harm, they have argued this themselves in court. Their job is strictly punitive, again an argument they have made in court many times. They only pretend to "protect and serve" when it suits their agenda of justification for their over inflated budgets. This isn't a public safety issue. It's a class warfare issue.

Cats are most active and generally hunt in the early morning, pre-dawn, and evenings. The "lazy" male lions that he's thinking of generally don't do much hunting. Bears hibernate because the alternative is starvation. You know what squirrels do? They play. Like ALL THE FUCKING TIME. Everything a squirrel does seems to be a game from foraging to fucking. When I don't see them playing, they're sprawled out relaxing. I'd rather be a squirrel.