You talking about something that's already been fixed mate, Ethereum transaction fee is no longer a problem and August is close which we will see even better and cheaper transaction fee on Ethereum network, the headache is already over, as for the question you asked many people just prefer ETH and you and I can't change their minds
Most people don't consider the price fixed or low, maybe after the August hardfork we might see a remarkable price drop in transaction. People don't use ethereum because of the transaction prices although when compared to Binance blockchain, it is significantly low. They also consider the better smart contract, the DAPP compatibile and good Defi use.
At the time when the transaction fee of ETH was so expensive, there are so many new network was coming just like BSC. People are moving and leaving ETH that's why peopel are not looking back again to use ETH because they are already confy with BSC or other cheaper network. ETH has a lot of strong competitor right now, they have to make some innovation to make their users and holder back otherwise people are leaving it permanently