It's an issue - no doubt. With the likes of Fidelity now doing custody, the hope would be that this can be improved on.But Bitcoin owners have lost out a few times due to exchanges going bust or being defrauded. So there is a significant difference.
Bitcoin hates regulation when it remains decentralised. i.e. if you or I are moving it about - and take responsibility for custody, then any loss is through our own incompetence.Bitcoin hates regulation - but bank customers benefit from it when things go wrong.
Decentralised exchanges - as they emerge - will also assist here.