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.
Then our system works even better than those trustee solutions. Since with our system the buyer will not get his funds back if he attempts to scam the seller.
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.
There are no buyer focused payment methods in the current anonymous cryptomarket, they are all seller focused. You can increase trust with SavAct as much as you can increase it with other anonymous cryptocurrencies. It is also not a freebie for buyers, because the buyers are unable to keep their funds. I want to mention here that the current anonymous cryptomarkets are freebies for sellers, as they get to keep funds and goods in case of a scam.