To piggyback on your point, Pettis lays out explicitly how China should shift to consumer-driven GDP growth... then also points out how politically difficult it will be (because it likely entails assigning losses to the wealthy and politically connected, via breakup of SOEs, transfer of wealth to households from the government, etc).

So yes, grandparent's point is correct, that there's room for consumer-led GDP growth. But the mechanism for how to get there is not easy. (And it's something Pettis has written about extensively.)