The Egyptians believed that if they didn't worship their gods enough, or perform cursing ceremonies to damage the chaos snake Apep, then it would eat the sun god Ra in his sun boat as the sun went down, and the world would be cast into eternal disorder in an apocalypse of chaos. They took their shit seriously, you weren't allowed to portray Apep without it being kept at bay by either magical text, a depiction of a powerful god, or a weapon being depicted wounding it. The Greeks used mythology for entertainment, it was a game. The Egyptians entire society was built to worship. Each new Pharaoh would dedicate their reign to a specific god, who would be worshipped especially during that time. A lot of the political elite was made up of high priests.