Credit card companies almost unconditionally insure their customers against fraudulent transactions. Bitcoin does not. Banks will actively monitor accounts for suspicious transactions and lock the account if necessary. Bitcoin does not. Banks provide a friendly, easy to use and traceable list of your previous transactions. Bitcoin does not. Banks provide a mechanism to reverse transactions. Bitcoin does not.
As a consumer though, I much prefer the fraud protection that the credit card companies provide. And as a vendor, the 1% or less of chargebacks is probably outweighed by the number of customers who do buy because they feel safer using their credit card online.
Bitcoin/cash shifts protection from third parties, like stores, to the user. This dramatically changes the nature of security in both good and bad ways.
To swap out a word or two: "Fraud protection in the sense that, if you protect your wallet, no one can steal your cash."
I don't think that matches the commonly understood meaning of "fraud protection".
ALL
If you know someones address then you can go back and check all the transactions.
As for refunds, merchants selling using bitcoin still have to follow law of the land, in most civilised countries there is a "Supply of Goods and Services Act" or equivalent legislation where a customer is entitled to a repair, replacement or refund if the good/service is bad. Buying with bitcoin is no different to buying in cash
You obviously do not understand bitcoin or are confused about some aspects of it.
Groups of people that trust a third party can also do bitcoin denominated private transactions (the only visible transactions would be with the trusted third party). You see this at most bitcoin exchanges.