Agreed !
But we CAN turn this OFF (yer welcome)
Create a new document named Window.defaults
In there put
ImplicitInstance=false
Put it in ~/Document/Xojo/Overrides
And you can duplicate it and name it DesktopWindow.defaults to affect the new “DesktopWindow”
You can alter a lot of the default values on new items this way
https://docs.xojo.com/UserGuide:Overriding_System_Class_Defaults