Great! Talk to the camera.
Cops are used to talking to Ring and Blink doorbell/camera units these days. But none of the situations you mention are unable to be taken care of (at least initially) by a camera with two way audio. No reason to answer the door in person until you have established who it is and why they’re there via your camera system.
You understand cameras have their limitations? They have blind spots, wireless cams can be hacked, wired cams can be compromised, they often do not detect for numerous reasons and some have lag times, they can be affected by weather/power issues, etc...Furthermore, bad guys nowadays are emboldened and most don’t care about cameras, and they wear masks, hoods etc. Also, not everyone can afford these systems.
Btw, I too have audio/video cams as well as other security assets, so I understand what they can or cannot do. Bottom line, someone banging on your door in the middle of the night might be there trying to save your life, warn you etc. Ya never know.