That is very true, but the words meaning and how they've been used before does impact how people would view it.
I'm simply stating what I believe to be the most appropriate way of using the names.
And the name Lich stems from the undeads. The lich is a undead mage, A dead sorcerer still in contact with his abilities from whence he was alive.
Or so it's mostly explained.
But of course everyone has their own opinion, I simply expressed mine.
And I do agree with you, Creativity is a beautiful and wonderful thing.