Because in this case the "solution" doesn't solve the rest of the problem: that their aren't enough truckers or locomotives to haul the cargo inward to their domestic destinations due to the unprecedented demand for shipped goods, which is why containers were piling up in the port in the first place.
This just solves the problem of allowing slightly more ships to offload their cargo before they run out of space again. But as there are 100+ ships currently waiting to offload, this expanded "buffer" still isn't big enough.
EDIT: left out of the one-sided linked article: the city of Long Beach had been planning to waive the stacking requirements for a while prior to the Flexport CEO going on his rant due to pressure from the White House dating back to this summer. Container storage near (not in) the ports actually falls into 3 separate jurisdictions: the ports of LA and Long Beach, and the cities of Long Beach, LA, and Wilmington, and required coordination between all these agencies, coordination with the logistics companies operating at the ports, and coordination with the domestic shipping companies that would be moving containers out of the container storage areas (via truck or train).
This just solves the problem of allowing slightly more ships to offload their cargo before they run out of space again. But as there are 100+ ships currently waiting to offload, this expanded "buffer" still isn't big enough.
EDIT: left out of the one-sided linked article: the city of Long Beach had been planning to waive the stacking requirements for a while prior to the Flexport CEO going on his rant due to pressure from the White House dating back to this summer. Container storage near (not in) the ports actually falls into 3 separate jurisdictions: the ports of LA and Long Beach, and the cities of Long Beach, LA, and Wilmington, and required coordination between all these agencies, coordination with the logistics companies operating at the ports, and coordination with the domestic shipping companies that would be moving containers out of the container storage areas (via truck or train).