I presume you haven't been to China in the last decade or so, since they most certainly did "turn the trick". Consumption as a percentage of GDP exceeded 50% back in 2009 and has been slowly by steadily growing ever since, and an increasingly large portion of the Chinese economy has nothing to do with exports.

I do agree that the decades of steady 10+% growth are over, largely thanks to demographics/aging, but a Japan-style stagnation seems more likely than an outright collapse, unless Xi does some really catastrophic miscalculation that triggers WW3.