That might not be a marginal deterrent if the criminal has already committed significant crimes.

[murder suspect] + [doesn't fight] = [life in prison], [no chance of escaping]

[murder suspect] + [does fight] = [life in prison], [non-zero chance of escaping]

This is actually a reason we might want to reduce sentences for some crimes. 'Tough on crime' laws make criminals more brazen.

Some crimes, sure. I don't think (intentional) murderers should be getting released back into the public very quickly though

Criminals committing acts of violence often are not acting based on rational reasoning. Often it based on emotion/fear /anger.

You don't need to draw and shoot a gun if merely having one visible makes the cops get out your way and await backup.

Which is good. It means we can avoid violence, collect evidence for an easy conviction (such as videoing a firearms violation) and apprehend criminals safely using trained SWAT forces.

Nah, cops will just gun you down if they "think" you have any sort of firearm.

Watch this video. The cops don't see a gun, they think he has one because of the call, but they don't see one. The minute his hand goes towards his waste, they blast him...

https://www.abqjournal.com/1380152/apd-man-shot-by-officers-...