"The basic purpose of hiding the common prefix, http://, is to make URLs more visible. This will also help users to easily identify the website they are dealing with. Although, the URL prefix for encrypted pages (https://) will be displayed as usual to avoid confusion."

How is showing the prefix in one case and not the other avoiding confusion?

If they want to get rid of it, they should get rid of it fully, like the others, and use a recognizable icon for the modes, but not show it and hid it depending on the case. That's the base of confusion, no?