"Your perspective, your assumptions."
I am not subjective, but you are.
"I've learned that while it is not completely bullet proof, especially under certain circumstances - just like with your method"
1. Would you be kind enough to explain precisely under what circumstances are hardware wallets not bullet proof?
2. And explain to me what/which circumstances do you think will negatively affect my method that wouldn't do the same to hardware wallets?
1. It is not bullet proof in the sense that if someone uses their Trezor wallet in a careless manner, they stand to lose all of their private keys (as you've pointed out). I've also heard that there is going to be an official event where Trezor will be scrutinized to the MAX. Nothing is set in stone yet, but word is out that there might be a way(s) for hackers to compromise a Trezor wallet even if a user is not careless.
2. If you read all of what I posted, you will already know the answer to this question. E.g. as per the source you provided: "Used correctly, an air-gapped wallet is safe from all online threats, such as viruses and hackers. It is however still exposed to offline threats, such as hardware
keyloggers,
extortion, or people looking over your shoulder."
In any case, I rest my case. Onto better things like VERI!