A simple question- Why has buyer feedback, an action taking only a few seconds fallen to so low?

[realjazz-123]

I know it is not critical for sales, but please tell me why  positive feedback from buyers is almost gone? Over the past year I no longer expect it despite a  successful transaction. At the least the feedback indicates arrival of an item , especially welcome if it had been shipped  untracked. Surely taking a few seconds to press a few keys and acknowledge a completed sale is not  difficult. What has changed  and why has this happened? 

[nuvistors]

The seller holds all the cards.

The buyer  hopes the seller described the item properly.

The buyer hopes the  seller packages the item properly.

The seller holds both the money and the item until it is shipped.

And the buyer hopes the seller ships to the correct address.