Exactly this...it's not apples to apples comparison. Transferring an NFT is a larger transaction size so the cost is higher (hence the $22 price they are referring). The cost of the transaction is also based on how busy the blockchain is...like a way to discourage transactions if it's really busy. Like if you had a gas station that the price of gas (or actually more like a fee to use the gas pump) fluctuated based on how long the lines were.