Default. Go to Wikipedia and after the definition of 'default - computer science' it says: "Default values are standards values that are universal to all instances of the device or model and intended to make the device as accessible as possible "out of the box" without necessitating a lengthy configuration process prior to use. " I maintain that the process' some have mentioned to change a default ip have failed this condition big time. Isn't this obvious?
I rest my case.
And in the case of these Dahua OEM cameras, setting them back to the known default IP address of 192.168.1.108 is making it as accessible as possible for their intended market.
And it isn't just Dahua and Dahua OEM. Hikvision OEM default IP address is 192.0.0.64.
Further, you have to remember that the homeowner isn't the Dahua and Hikvision target audience, it is the professional installers that are authorized to sell and install this gear, so we cannot purchase directly and thus they will not take your phone call for support related questions or suggestions - they will tell you to talk to the installer you purchased from. Many people have bought a "Hikvision" or Dahua from Amazon or some shady foreign website and when they call Hikvision or Dahua for support they basically tell them to go pound salt. We simply are not their intended market to sell to and they will not take your call for support...Lot's of threads here confirming this, including one from a few
months ago where someone tried to call for support and they told them sorry talk to your installer....
So yes, it is obvious that a factory reset is making the device as accessible as possible to their intended audience - the installer.... They know based on the manufacturer what the IP address will be for the camera and not have to hunt it down to what some router may have assigned it. Stick it on a system with 100 devices and trying to figure out which IP address the system assigned it would take awhile to find that camera. This makes it simple.
We are just fortunate to be able to get our hands on these types of cameras and a forum like this to help us troubleshoot when needed. If you can't follow along, then go with consumer grade stuff.
We simply are not their intended user, so if you want it simpler, then you need to go to consumer grade stuff like Ring, Arlo, Nest, Reolink, Blink, Eufy, Night Owl, etc where you simply scan a QR code and you are good to go. Not very secure and the imagery won't be as good, but it is simple to get going.
I rest my case....