On the contrary, I think a "simulator of common objections" that reflects all the blind spots and biases of wider society is an extraordinarily valuable tool for exploring and evaluating new ideas. You might find that, in neatly summarizing what "everyone" thinks and justifying it as best it can, the LLM inadvertantly shines a spotlight on common misconceptions. Look there for the novelty.

In this case - the concept of using automated computing devices to manipulate numbers that represent ideas at arbitrary levels of abstraction was, by 1930, nearly an entire century old. Talkie's myopic viewpoint does not represent the most farsighted viewpoint, merely the average. So if, in 1930, you had read the writings of Ada Lovelace, gotten very excited, and wanted to figure out how to pitch it to investors - Talkie might have been very useful.