I have had the same problem as you for a long time, the eth gas fee is indeed very high, therefore I use the BSC network more often than the ETH network, the BSC gas fee is much cheaper than the ETH gas fee
In most cases, this is due not to our desires, which network to use, but to the realities existing in the cryptocurrency market For example, before the Pepe coin was listed on CEX, it could only be bought on the Ethereum network on a decentralized exchange. And your desire to use the BSC blockchain could not allow you to buy such a coin on this network.