If you can't risk your life saving innocent people from criminals, don't become a cop.
The cops at the concert did great job of saving lives but the cops who went to hotel didn't do anything about the shooter or to prevent further shooting.
https://www.policeone.com/police-jo...cops-confusion-over-the-public-duty-doctrine/
The so-called public duty doctrine provides that “absent a special relationship between the governmental entity and the injured individual, the governmental entity will not be liable for injury to an individual...
the governmental entity owes a duty to the public in general. The doctrine has been commonly described by the oxymoron, ‘duty to all, duty to none’.”
The concept of “duty” establishes a great moral obligation in those who have taken an oath to serve and to protect the public. Officers are instilled with the principles of honor, integrity, and selflessness. As a result of these basic principles, officers often feel required to take action in certain situations when taking no action may actually be the best course of action. Often, officers believe that they have a legal obligation to act above and beyond what is actually required of them.
Law enforcement professionals’ lack of understanding of the legal principles of the public duty doctrine often leads to inappropriate actions on the part of the officer.
As a general rule, an individual has no duty to come to the aid of another.
By becoming a police officer, an individual does not give up his right to the protection of these general principles. A police officer does not “assume any greater obligation to others individually. The only additional duty undertaken by accepting employment as a police officer is the duty owed to the public at large.”
That's what we expect (those who swore to protect to protect us by taking risks) but looks like they are instructed/trained only to protect people against criminals who have smaller guns than what they carry or only when they have no risk of injury or death.
Why risk our lives?
There is no reason for police to actually risk their lives. Look at the links above and below. Police only have the duty to pick up the bodies and investigate.
http://jpfo.org/articles-assd/just-dial-911.htm
No Duty to Protect
It’s not just that the police cannot protect you. They don’t even have to come when you call. In most states the government and police owe no legal duty to protect individual citizens from criminal attack. The District of Columbia’s highest court spelled out plainly the “fundamental principle that a government and its agents are under no general duty to provide public services, such as police protection, to any particular individual citizen.”
When these women later sued the city and its police for negligently failing to protect them or even to answer their second call, the court held that government had no duty to respond to their call or to protect them. Case dismissed.