Because a glass may get broke and need replacing.
Why are rabbet and stops used when mounting glass
Forgive the possibly silly question, but why are rabbets and stops used when inserting glass into doors? I was looking at my doors, as well as some diagrams such as the one below and the glass sits in a rabbet and then secured from the other side with stops. Why not slide the glass into a groove? Is this just so the glass is replaceable, better fit? Or are there other reasons?
