The set of possible failure states that can happen before excaping the gravity well is even possible so vast that it seems to me that the only valid "Great Filter" is Murphy's Law.
We are only here at all because a random asteroid killed the dinosaurs and left us a ton of hydrocarbons to fuel a technological civilization with. Assuming that intelligence, technology, civilization and galactic expansion is the default evolutionary path for all forms of life unless something "filters" them seems naive.
We are only here at all because a random asteroid killed the dinosaurs and left us a ton of hydrocarbons to fuel a technological civilization with. Assuming that intelligence, technology, civilization and galactic expansion is the default evolutionary path for all forms of life unless something "filters" them seems naive.