Yeah, in fact for me the trust in a banking system (or anything else that keeps my money) is not in being in control, but in knowing that if things go wrong (regardless of whether it's someone else's fault or my own) I can complain and have a more or less realistic expectation to get my money back. For example, my main credit card was used fraudulently a couple of times, through no fault of my own (AFAIK), but the bank rolled back the charges, cancelled the card and issued a new one. This makes me trust using the card.
In the last few years, at least in my country, many banks seem to be transitioning from "patchy security, but take responsibility" to "better security, but blame the client". I.e., they add lots of mandatory over-the-top 2FA, etc. but if a client complains of a transfer they didn't make, surely it's the client's fault, because security is really good. This makes me trust such banks much less. Firstly, because even being a tech-savvy user that doesn't typically fall for scams, etc., nobody is perfect and I don't think anyone is 100% free of making a security blunder in a moment of being sleep deprived, ill, drunk, etc. And secondly, because what if they get hacked somehow and they make me responsible? No, I very much prefer worse security but listening to clients.
Similarly, in crypto, "your keys, your coins" doesn't give me trust. What if I lose my keys somehow? In the bank, they know who I am, as long as I have a means of ID I can get my money. And as you mention, even if the bank fails, the government has my back.
For all these reasons, while I do hold some crypto, I'd never keep a significant portion of my assets in that form.