Can I not access my backpack when i disable it in the coregui?

So I disable my backpack in the coregui but now I can't access that I didn't think that was going to happen? or did I do something wrong?

This is my script

local StarterGui = game:GetService('StarterGui')
 
StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Backpack, false)
~~~~~~~~~~~~~~~~~'

so why can't I still access whats in my backpack by using keys 1-9?

As dyler3 said, Disabling the CoreGUI isn't just making it invisible. it basically deletes the entire file that creates the GUI. But you can bring it back to life by enabling it again.