Except we don't "send" the recycling to China, rather China
buys (bought) it from us.
So because they bought it, they value it, which means they are not just dumping it wholesale.
> the bubble barrier works on plastic pollution, so we're talking about plastics and recyclables.
But we are not talking about plastic from the US or Europe, rather we are talking about local plastic. Because, as I said above: China is not dumping random plastic in rivers, they value the plastic because they paid for it.
(Yes, there is some waste mixed in, that needs to be disposed of, however that's a minor amount compared to waste in general, and especially compared to local waste. If you need a ref on that see my other comments in this thread.)
In summary almost zero plastic from the US or Europe ends up in the ocean via a third world country. That's simply not how it happens. If you want to solve this problem you need to look elsewhere instead of blaming first world countries as you did in your earlier post.