The blockchain bridge was created to address the issus of lack of interoperability, scalability issues and many others.

Transferring from one token to another requires a large number of gas fees, but with blockchain bridges, user can then save up their transaction fee instead of burning it up on gas, and make the transaction through blockchain bridge, this will be very beneficial to users who commit lots of daily transaction on a separate network.

That's very true, it has helped to reduce excessive gas fee. An example of that is the Arbitrum bridge where transactions are bundled to reduce individual gas fee on the Ethereum blockchain.