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Then one shall ask himself why we are using us as an element of comparison to civilizations that are in fact so far and advanced compared to our?
Another logical deficit is represented by the implicit judgement which is behind the grading of civilizations (Type 3 or Type 1). In the human history it has been proved that is our main specialty to classify according to a value-based scale, which does not imply that this judgements are also done by other interplanetary civilizations.
So, in summary, your critique is that retrospective models of reality cannot forsee "black swans?" While that may be true, predictive systems have to be based on something. I would go so far as to say, logic depends on establishing a causal chain, and what is a causal chain if nothing more than an accurate description of interlinking past events? Logical theorizing then being extrapolations that posit the least number of additions.
That said I would expect numerous modes of transport through space including everything from spores to bacteriophages, like ΦX174's DNA sequence, as being possible, if not likely, transport mechanisms. The "biological carrier model" is in many ways similar to the drone hypothesis in the sense that the vehicle or capsule does not house and/or protect the sapient species itself as it traverses space, but instead behaves as an engineered forerunner.
Are you saying energy consumption and expansion is a value that may not be shared between species? One of the many wonderful features of our home planet is we have a plethora of species to compare ourselves against. The idea of requiring more energy to decrease exigency is seen across all types of life. Ants herd aphids. Primitive man used oxen to furrow his fields. Stars die, planets lose heat, so a constant expansion and search for new energy sources is a biological necessity.
There is a curious paper written in 2009 that develops this idea in greater detail called "The Scarcity Hypothesis." It is a tad terse, but it describes a universal behavior across all organisms to decrease scarcity and correlates this through energy consumption using Kardashev's scale. I think you may find it useful.