I was thinking, titans went to countless worlds and seeded them... but how? Well, they used some machines and build some facilities... but what if we're getting all this wrong?
What is the titans are just aliens whose technology is surpassing that of any race so much that we think of them as creators of worlds and whatnot. In the end, they created the Well of Eternity... but used machines to create everything? Why not use magic? Because they can't. But wait... we can use magic, right? And we were given magic by them, since they planted the ley lines and the Well of Eternity and all that, right? Well... if I plant an internet cable under you and you access the internet on your phone, do you have internet powers or are you just using a device to tap into the cables I put there for you? So what if the Well of Eternity was just radioactive waste and that's why it gave powers, they were actually mutations that made the races able to adapt and absorb radiation?
So I present you a different angle, I want you to think on it. Titans are just a race that achieved inter-planetary travel. They go from world to world planting facilities and using robots (Mirmiron and all the mecha-gnomes are robots in the end) and creations made out of metal and stone (like earthen, iron dwarves, iron vrykul etc) to protect said facilities from foreign intrusion from native races and continue the research.
But one leader decided why should he fall in with the rest when he can be God to some races after being sent to subdue him. This is Sargeras, and he was in fact the commander of the armed forces and didn't want to fall in line with the bureaucrats. This explains why the other titans couldn't defeat him, it's hard to remake an army from scratch when the other guy had it and either it's on his side or he destroyed it. So then Sargeras decides to form his own state and uses his primitive races that call him God and sent them to conquer the worlds of the titans.
What if, right now, this is not a battle between the "good" titans and the "bad" titan, but rather a civil war in the titan society where one leader didn't agree with the rest and thus decided to go and overrule the others?
Furthermore, what if most of the races of Azeroth weren't put there intentionally? I mean, excluding gnomes, dwarves, humans etc, which were put there with a purpose, what if the other ones were actually experiments, as in, the titans had their civil war with nuclear-like weapons, and many of their core planets are now radioactive, and they tried to create specimens that can stand and even use the radiation so that they can later use the mutations on them later? And in fact right now they're studying us like scientists are studying animals in a zoo trying to figure out how to get the benefits of our mutations... but they can't come and retake some of us for studies since... the Legion is attacking us and Sargeras is stopping them, since he wants the same?!
It all makes sense now. Most races on Azeroth are just some titan lab experiment made possible through radioactive material. Titans are just some super techy race fighting a civil war. We're all animals in a zoo.