Bitcoin is still undergoing development and the two soft forks that happen in Bitcoin development is somehow related to minimizing transaction fee.  If we look at the history, Bitcoin first implemented  segwit.  A bitcoin update that reduces the size of transaction, thus making transaction fee lower.  Then comes taproot that further reduce the transaction fee.  Before the ordinal issue, Bitcoin transaction are cheap, until someone uses BRC 20 token to congest the network and evenutally