Wait, you simply let users know what's a button by the visual decorations and differentiated edges? And you let them know the status of toggle buttons without

Wait, you simply let users know what's a button by the visual decorations and differentiated edges? And you let them know the status of toggle buttons without forcing them to toggle multiple times and guess based on which colors what might mean what? Blasphemy! Next you'll be letting web pages readers know what is and is not a link by using a consistent underline scheme. Which would be a completely unacceptable level of interpretability.