If you went back in time 50 years ago and asked if things like the power grid or resources distribution or the supply chain at the time would be sufficient to handle the current population, the answer would be an obvious "absolutely not." But it did work because our capabilities also increased with population. The assumption of the topic headline is that our current port capabilities and infrastructure will remain the same forever, which is obviously an absurd notion.
“If demand for goods remains elevated in perpetuity, the Ports of Los Angeles and Long Beach will never fully clear the logistical hurdles required to untangle the supply chain,” and “the supply chain will never normalize, barring significant infrastructure investments,” they wrote.
Good thing we just passed a significant infrastructure investment then!
But how long until you see the results of that, 5 to 10 years at best? A hypothetical new port in Oregon if you decided to build today at breakneck speed would be at least a decade before you could probably ship anything through there.
"as long as U.S. consumer demand persists" - i.e. stop the helicopter drops, raise interest rates to reduce U.S. consumer demand, and the supply chain goes back to normal