The pertinent context in question IS about evil; it is not here concerned with various rulers; it is concerned with evil as called Lucifer (a.k.a. Satan) in Isaiah 14:12
God spoke to Isaiah here and God DID NOT intend this to be anything related to Venus or other rulers. Your analysis is fallacious.
If you wish to understand the Bible, you must read it in context when a word is used; not rely on history's usage as a primary source for meaning. The Bible is God's Word to us and His context is what supremely matters, not the worlds understanding, but God communication to us on what He means.
He told you this or you assume this?
shalom b'SHEM Yah'shua HaMashiachאֵיךְ נָפַלְתָּ מִשָּׁמַיִם הֵילֵל בֶּן־שָׁחַר נִגְדַּעְתָּ לָאָרֶץ חֹולֵשׁ עַל־גֹּויִֽם
Darby version ( 12. How art thou fallen from heaven, Lucifer, son of the morning! Thou art cut down to the ground, that didst prostrate the nations! ) .... so far, the rest of the versions say day star, or son of the morning, or son of the dawn.