Oh, but it does, if you treat "assembling a copy of yourself from atoms in the environment" as equivalent to the implementation details of printing to standard output.
> causal property
"assembling a copy of yourself" is a description you are imposing on a series of events.
The events in the case of a digital computer are certain oscillations to the electric field. That shares nothing with the chemical assembly of biological material
That's the problem with analogies: they are observer-dependent.
A quine shares no causal property with DNA.