Because they are different goods that can't be aquacultured locally. Because PRC fisherman gets to make a living selling higher value wild fish like everyone else. Because it's simply not a problem when PRC decides to fish in international waters, again like everyone else, all of whom are similarly poorly behaved, i.e. SKR, JP, TW, ES... but you know 3/4 of those are US partners vs PRC, so they don't get the smear campaign.