The reference in Isaiah actually refers to Babylon (the “morning star” of civilizations) and predicts its fall. Just about any Biblical scholar will tell you that; it’s not even disputed. A medieval monk who was not particularly familiar with the context associated that phrase with Satan... but “Lucifer” was never intended (by the Hebrews) to refer to Satan.
Not possible for Babylon itself to rise up to the heavens and “be like the Most High” (never mind falling from heaven in the first place without having been there prior), but the power behind Babylon certainly gave it a try. (My experience is that the phrase “it’s not even disputed” is like the global warmists’ “settled science”, with all due respect; everything is disputed.)
And you are calling John who wrote Revelations a “medieval monk”? or Jesus himself? And who can not detect the evident malice in Satan’s words in the book of Job?