Earlier quoted context omitted.
I stopped buying Ubiquiti when I reset my UDM Pro and took it to another house without internet access, and it refused to "activate" without an Internet Connection or a phone app connection. Seems they are more interested in selling a lifestyle rather than actual production network equipment.
Im not excusing Ubiquiti here, I agree thats pretty annoying. However a UDM pro is a router (as well as other things). The expectation is that it is connected to WAN. Unifi switches and access points etc do not have the same online requirement.
This meant for instance if your WAN required VLAN like New Zealand you couldn't actually set it up without another router. Their fix is to add 1 more option to the WAN configuration options rather than the full suite of WAN configuration options you get once it's talked home.
The partial fix does make it clear that the philosophy of "you must talk to the mothership" is a guiding one that ubiquiti sticks to.