But I will buy a Trezor T wallet because they promised that the secret phrase would not leave the wallet.
Don't be naive, Ledger said the same thing in the past
By using a hardware wallet, you're basically trusting them with your money, while the security of "be your own bank" shouldn't depend on third-parties. I really hate this part, and even when using offline software wallet, you have to trust
someone. It's impossible to verify all the software you're using, even if it's open source. "Trusting" goes against the basics of Bitcoin, but it's inevitable one way or another.
What is the actual problem in KYC? The fact that your identity is revealed to some 3rd parties or the fact that your bitcoin address is trackable?
The main problem I have with KYC is that I have to
trust them for doing the right thing, while many companies (and governments) have leaked private data in the past. This
will happen again. At least if they don't have my data, they can't leak it. And this scenario is already undesirable even if the company doesn't do bad things with the KYC data on their own.
your data is never safe, tons of people already have access to it and still you have to reveal it many times in real life.
All the more reason to share this data as little as possible. I've closed bank accounts because they wanted more data than I want them to have.
While it's true that three companies, including Ledger have access to your KYC documents, at some point we can say that revealing your KYC documents can't really affect your quality of life and personally the only threat I can see is that they'll know when and how I spend my crypto, they'll know it for sure. Besides this, is there any other reason to be afraid of KYC?
How about a $5 wrench attack? Ledger already leaked their customer data, which is a long list of people who own a hardware wallet. Add to that the balances of each wallet, and suddenly targeted attacks become very profitable.