Kenyon’s work took place the better part of a century after the bias against the Bible had taken over everywhere. In order to undermine the divine right of kings the content of the Bible had to be rejected (or rather, that was the preferred path — rejecting the divine right of kings is something that doesn’t actually derive from the Scriptures).
That didn’t even begin with debunkers — the exaggeration of the age of the 19th dynasty is still supported by purported “Bible was right” people, who saddle on the ridiculous idea that Ramses II was pharaoh of the Exodus or the Oppression.