You need to spend more time with it...it is way more feature rich than pss or ivms...it just boils down to what you need...here are just a few examples.
1) the schedule allows you to easily change alter and motion detection settings based on time of day...including a relative to sunrise to sunset option which allows distinct motion settings for nighttime vs daytime.
2) you can have separate threshold settings for alerts vs recording..this ensures that you dont miss any motion but only get alerts when there is something significant going on (this is accomplished by cloning the camera and setting it for alerts only and hiding it from the main screen).
3) You can use the area of interest option to cut a camera in two, and display it as distinct cams, or just display a portion of the camera with out it being obvious that you are blocking a portion of the cameras view
4) it has a superb webserver, that allows you to remote view without having to port forward each camera which is security risk.
5) most importantly it allows you to mix and match cameras which pss /ivms does not...also i think you are referring to ivms, as pss is for dahua
This is just scratching the surface...i would go nuts if i had to rely on pss/ivms with respect to alerts...However, if you just need basic recording functions then yes those are fine...
blue iris uses pay extra for the multitude of options...its not just random boxes as you assert...if you take the time to learn the software you will see that each option is there for a reason...