Because there is no specific argument to be made. That's the entire point of turings immitation game paper. It does not matter if your conversation partner is

Because there is no specific argument to be made. That's the entire point of turings immitation game paper. It does not matter if your conversation partner is made up of a giant turing machine, a huge set of prolog rules, a giant neural network with a single hidden layer, a really deep transformer, a convolutional kernel, or a bustling pile of ants drawing words into the sand. When conversing with one another we have the implicit assumption that we are not the only conscious being in existence despite it being a completely subjective phenomena. Everything else would be quite impolite. Turing extends that (im)politeness to non-human phenomena. So long as there is the appearance of intelligence and consciousness it is the polite thing to assume that there is actually consciousness.