That just states an opinion with no supporting data. In reality, PayPal (and eBay and Amazon and...) are all buyer-focused and screw the seller by default.

I don't see how another buyer-focused payment system will help sellers who can already "increase trust" through standard methods (reviews and everything else you suggest). It's basically a freebie for buyers, with anonymity thrown in so the sellers can't even blacklist scammers.