no, its because if they dont unload the ships they make more profit later. no, its because the dock union has 3 people working the whole dock because of COVID Seriously, they are ships lined up waiting to unload , and some are just waiting because they are told to wait. You can walk to china walking from ship to ship, its that backed up https://www.usnews.com/news/business/articles/2021-03-21/supply-bottlenecks-leave-ships-stranded-businesses-stymied (anchored ships)