Intresting... the traits bestowed on the signs are from there ruling planets, these planets being derived from mythology. Like Scorpio is aggressive, and is ruled by Mars, God of War and violence...
We're digging into a murky area here. This is looking for the rhyme and reason in astrology. I can assure you it isn't about mythology as that would imply WE have power over the cosmos. When I say that, I mean we build these mythologies and come up with these stories or derive them from actual things that have happened and then dedicate parts of the heavens to them. It all implies we understand the cosmos and define them rather than looking to them to understand
Mars could very well have been named the planet of love and Venus the planet of violence and war had something changed
So I have to say that mythology is an interesting subject but has no place in understanding people and things and how they are because of the cosmos as that's not what mythology is about
For that matter, I wonder how we ascribe the traits we do to any of the planets. I need to do a lot of digging on that, but I don't think the answer is gonna be in mythology, not the mythology you've been delving into anyway. The answer may be in shamanism, maybe Eastern religions/ faiths like Hinduism
Thus far, astrology to me has been all about the proof in the pudding, but honestly, I'm never satisfied with just tasting the pudding, I wanna know all about it, where it comes from, how it's made, what it's made of