ATMs and credit cards both have fees (I believe you are joking). It may have zero confirmation time but It's possible to chargeback and get scammed. Lightning Network should give us the ability to make micro-payments and without waiting for confirmations too. Banks control your money, you don't. I see no reason on why fiat is better than bitcoin.
Cash is better than bitcoin since it is the only currency we knew since the beginning and it is easy to use, but on the other hand bitcoin can be secured efficiently, carried through the internet and used by internet connection. Only physical and virtual world stands in between, but if bitcoin is physical it would value to a diamond or a high valued crystal since 1 bitcoin has a large value. That is why cash is better since it does not need internet and can be carried even though a lot, also has a lot of value.