Do hardware wallets store the wallet.dat redundantly inside? If not, are there such hardware wallets? I'm baffled by how &quot;cheap&quot; the existing hardware wallets look and seem. They seem to have been made &quot;at a budget&quot;, with no real high-end version available.
If I owned something like 1,000 BTC, or even 100 BTC, I would want a damn mini fortress of a metal cube full of security measures and like 100 different memories, all individually holding the wallet.dat (encrypted), physically separated from each other and with a hardware switch needed to be flicked on for them to even have any contact with the &quot;main logic&quot;, and the entire cube to be fully fireproof and waterproof down to a 10,000 meters and able to withstand thousands of blows from a sledgehammer.
From what I can tell, these hardware wallets are just a single flash memory holding all my coins on it. They even tell you to back it up immediately... which seems to defeat the purpose of having a hardware wallet, if you have to store the wallet.dat redundantly anyway... in practice meaning it goes with all my other files which come into contact with my potentially compromised PC regularly.
I've really tried to research these hardware wallets, but all of them seem like a bad joke to me. I've only grown more and more skeptical to getting one, because my current (bad) system of storing my cold storage wallet.dat on multiple encrypted disks which DO regularly come into contact with my PC seems &quot;just as good&quot;, if not better...
I hope I'm missing something, and that somebody can enlighten me.
Basically, how do rich Bitcoiners store their coins? Seriously? How? How do they sleep at night?
I hope I'm missing something, and that somebody can enlighten me.

As I expect you know, information-security can be described as a combination of confidentiality, integrity and availability.
You seem to be concentrating on availability, I believe the makers of hardware wallets are prioritising confidentiality.
If you have a hardware wallet, you are likely to want to also store copies of your recovery-phrase (AKA seed-phrase, backup-phrase) in other secure places e.g. stamped onto corrosion resistant metal plates in safes and/or safety-deposit boxes perhaps in multiple locations. That way, you don't lose availability if the hardware wallet is damaged, destroyed, lost or stolen.
If you keep your wallet.dat on encrypted flash drives, your confidential data is much more exposed than a hardware wallet. At some point the encryption layer decrypts the wallet.dat so that your wallet software can read and write to it. Your data is transferred into a potentially compromised environment with a comparatively large attack-surface. At that point it is probably accessible to malware or vulnerable to a maliciously altered wallet application. This is not the case with a hardware wallet - the secret keys are never accessible to any PC, they never leave the device.