That’s a terrible argument. That was one pharaoh and the monument would have been finished within his lifetime

That’s two pharaohs and the mega-monuments completed over 27 years that Ramses lived to see were the exception rather than the rule.

And, again, I was talking about the Jesus of the Bible

The Gospel of Mark is part of the Bible. That makes Jesus at least as historical as anyone in Herodotus’s Histories. Significantly more so in many respects, as Herodotus writes on The Trojan War, some 800 years before his birth.

If there was a real Jesus, we have absolutely no idea what, if anything, said about him in the Bible actually happened or was something we said because there is no evidence of it outside the Bible

You could say the same of the Anatolian tribes or the Achaemenid dynasty or Sparta.

there is no real physical proof that Jesus Christ ever existed

Go back far enough and there is vanishingly little biographical evidence that any singular person existed. From the Mayan Empire to the Australian Aboriginal People, you can wave your hands and dismiss them all, due to the lack of first party written accounts of their existence.