Why did most ancient Egyptians still bother with mummificating the dead?

Why did most ancient Egyptians still bother with mummificating the dead?

Why did most ancient Egyptians still bother with mummifying the dead and giving them grave goods for the afterlife, even after the New Kingdom, the Ptolemaic Era, and Roman Egypt?

Why did most ancient Egyptians still bother with mummificating the dead?

Even if it was necessary, according to their faith, for them to have an afterlife, it seems like sooner or later almost every tomb was robbed, and often the mummies were destroyed.

It seems like almost no one got to have a happy stay in the afterlife, as it would end for most people rather sooner than later.

And why didn't these beliefs change enough over time to compensate for this issue?

Why did most ancient Egyptians still bother with mummificating the dead?
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