I get that but I mean they are talking about plastic bottles floating in the ocean they are observing. Like intact bottles not stuff broken down into microplastics like most of that "run off" plastic waste. Assuming they aren't boating around the mekong delta I'd guess what plastic trash they do see boating (probably near shore not far from a recreational marina with a lot of other recreational traffic) is probably from other boaters just pitching it over the side. Occams Razor and all.
I don’t know where the trash came from, but it’s frustrating to have someone who doesn’t know anything contradicting my observations. Why are you speculating wildly about where I was, and making assumptions about something you haven’t seen in order to contradict an actual observation? All you’re saying is you don’t believe me, but based on imaginary made-up reasons. You should really go see it first. Occam’s Razor will support observations. What I saw was many many miles from a marina (deep sea fishing), lots of samples over several days of more or less constant density trash covering thousands of square miles. Trash from boats does not explain that. Occam’s Razor and all.