Key words there are field of view. I see way too many people posting screen capture pics and videos that are zoomed in roo far. This results in a small field of view.
What your eyeballs see, what the camera sees, and what the PIR sensor sees/detects for motion are all three different things. A longer/bigger field of view gives better detection results. It also gives too many false alerts. You have to error on the side of false detection vs. not enough or late detection.
It’s all an experiment in trial and error for EACH camera. Play, adjust, try again, experiment, get it right then go live. Don’t do the quick install and then get dissatisfied with live results. An unreliable camera system is worse than no camera system.