That's simply the risk a person takes by having a bitcoin wallet. Seems (at least right now) there are plenty of people who want the benefit of a permissionless value transfer system and are willing to shoulder that risk. Hopefully they secure their magical numbers / private keys better than the banks do, because yes, obviously, there is no Central Bitcoin Governor acting as the Reinstater of Last Resort.
Some people are fine with that risk. Others are not. It's totally cool. More than one value transfer system can coexist in the world.
What do you mean "better than the banks do"? For one, banks don't have single-point-of-failure account access like blockchain does, and for another, the risks of banks are much lower because credit card and ACH transactions are easily reversible.
These are all reasons that banks are more trustworthy and more secure than blockchain, which sees tens of millions of dollars of irreversible theft annually.
Some people are fine with that risk. Others are not. It's totally cool. More than one value transfer system can coexist in the world.