The problem is that people tend to forget that there are at LEAST as many bad buyers out there as there are bad sellers.

But if the Seller cannot trust the buyer to leave honest feedback then the sellers honesty and integrity is in question!

It's got NOTHING to do with Sellers waiting to see what feedback a buyer leaves for them. It's about leaving feedback for the buyer that is accurate.

Paying for an item is an obligation, if the buyer doesn't do that then there isn't any transaction in the first place.

The seller can ONLY leave a Positive, so they cannot threaten or bribe or destroy a reputation or whatever... the only ones who can and do that are the Buyers.