Frameless windows are not resizable on macOS

[filleduchaos]

I noticed that the WindowStyle#canResize option has no effect when the frame option is WindowFrame.noFrame on macOS. Digging a little deeper I discovered these lines which skip applying the resizeable mask to frameless windows.

Is there a reason why this is the case? In my experience with macOS dev, there is nothing that stops a borderless window from being resizeable. Besides, I think it's a fairly reasonable developer expectation that if a window is styled as resizeable then it should actually be resizeable.