There seems to be an opportunity for wider adoption here if governments and ports would chip in a bit more. I keep seeing news articles about ships being stuck

There seems to be an opportunity for wider adoption here if governments and ports would chip in a bit more. I keep seeing news articles about ships being stuck out of port for potentially weeks at a time due to backups at the ports and supply chain issues. Why not have governments pay these container ships to wait in trashy areas and collect trash while they are waiting to unload or load their cargo? If ships know they are going to be stuck waiting at ports for 10 days, then they can simply drive their ships much more slowly so they arrive at their destination 10 days later and collect more trash.