Amid the obvious axe you have to grind you lost sight of the facts. No bronze weapons = not yet bronze age.
The gunpowder age did not begin when China used it in fireworks, but when the Turks used it to bring down. Constantinople.
The nuclear age began when the USA used nuclear weapons on Japan, not when Marie Curie discovered radium.
Egypt was in the stone age until the Hyksos invasion introduced them to bronze weapons. You may not like that fact, but there
..... but there it is.
Multiple times.
hiccup.