Earlier quoted context omitted.
Uber's rates are already unsustainably low. Competition is one thing but unhealthy, unsustainable competition is another thing entirely. It's probably for the best that rates go up a bit.
Best for who? It's better for riders if rates stay unsustainably low and they can get discounted rides at the expense of VCs.
Rates that are unsustainably low cannot be sustained, by definition.