Why are Ethereum swaps so expensive?

Could you please explain why Ethereum swaps are so pricey? I've noticed that compared to other cryptocurrencies, the costs associated with swapping Ethereum seem significantly higher. Is it due to the complexity of the transactions? The scarcity of liquidity? Or perhaps the high demand for Ethereum? I'm curious to know the underlying reasons behind this phenomenon. Could you elaborate on the factors that contribute to the high cost of Ethereum swaps?