Yes, these robots are pretty slow and relatively difficult to deploy. It is extremely difficult to imagine a scenario where "loss of life to members of the public or officers is imminent", but police still somehow have time to deploy and pilot this thing into a crime scene from a safe distance. If they had time to do that, then there wasn't really an imminent danger.

Realistically, this will be used when someone has barricaded themselves in a house or something and is having a standoff with police, and they've gotten tired of standing around outside and would rather send their robot in to shoot the person so they can go home.