Can someone who actually understand what crypto is help me understand this

If a coin let us assume SUI due to its most recent price surge.

If many whales sell the price drops right? Ok but their sale is fulfilled by other buyers orders… so technically the transaction revenue is still there so why price goes down??

Person A-Z all have open buy orders for a total of 500k SUI/USDT at $3.4

A whale sold 500k SUI/USDT for $3.4

USDT should be transferred from buyers A-Z to Whale

SUI should be transferred back to A-Z buyers from whale

The same count from whale to buyers with the same price was placed and fulfilled.

Why does the price change then?