I think you're being a little too literal with the Earth Servitor thing. Rasputin is still an artificial life form, like a Servitor. I can't think of anywhere else where they refer to the Traveller as an Earth Servitor. Variks and all the other Fallen cards always refer to the Traveller as The Great Machine. They absolutely want "our" Traveller back. And, beating Rasputin would go a long way towards making that happen. Under your interpretation, Barron's Ambition is the only piece of gear/lore in the game that hints at more than one Traveller, including the absolutely massive Book of Sorrow. The Trinary star cult curse the Traveller because they believe (probably accurately) that the Traveller brought/led the Darkness to our solar system, not because they believe the Traveller is inherently evil.