1. Consciousness is observer-independent, so if one person observes consciousness, then everyone must acknowledge it.
2. If there are infinite observers of a given computation, each with a distinct interpretation scheme (e.g. observer i flips every i-th bit), at least one will interpret that computation as conscious.
3. (1) and (2) imply all computations are conscious.
4. This is absurd.
5. Therefore, computation cannot equate to consciousness.
No one would claim that pi (the constant) is conscious because some sub-sequence will parse as Shakespeare, nor would they argue that an excerpt of Proust is conscious because it required intelligence to produce. Let's agree on some sensible preconditions for consciousness (entity recognition and some notion of memory, among others) before we start trying to argue by reductio.