[q_eng_anon]

Error detection vs. error correction are very different things. It's true that many physical qubits (and a proper error correction scheme) are required to implement a single logical qubit. But once a valid design for a single logical qubit (device, error correction, etc.) is realized, the limits of scaling the entire system change completely (infinite t1 of each qubit means you don't NECESSARILY have to have all of your qubits on the same device...)