Why is Ethereum swap so expensive?

I've been wondering, why is the Ethereum swap transaction cost so high? I understand that Ethereum is a decentralized platform, but the fees associated with swapping tokens seem disproportionately expensive compared to other cryptocurrencies. Could it be due to the high demand for Ethereum's network? Or is it the complexity of the smart contracts involved in swaps that drives up the cost? I'm also curious if there are any plans to optimize the swap process to make it more cost-effective for users. Any insights or explanations would be greatly appreciated.