May ,it would be interesting, to have a board with the z translation value according to the FOV value to make the edges of the image match up to the edges of the stage frame !
It's pretty easy to find this by simply shift-clicking in the 'fov' input value and dragging the mouse up or down until it the edges match. (When you shift click and then drag, you get a finer resolution.) It only takes a second to do this.
Still wondering why this is default on and not off ?
Because when it's off, if you duplicate/copy+paste Controls within a document because you want more of a particular Control or set of Controls, it doesn't increment the Control IDs of the new Controls. Copying Controls within a document and wanting them to get their own Control IDs is a more common use case than wanting to copy Controls between documents while preserving the Control IDs, which is why it's enabled by default.