You can create 2 wallets, using a passphrase. Then, you can use ledger live only in your empty wallet to update the firmware.
I already explained this option in my reply you quoted. I was looking for a way where you can download the update manually and then flash it on an offline computer. It doesn't seem this is possible.
I just gave un example and we are not talking about some random people who run servers, we are talking about official wallet developers who openly say what they are doing.
I appreciate that, but I think the distinction is academic. The output in both cases is the same: Some third party is collecting your data, storing it, and sharing it, and if you don't want that to happen, then you need to run your own node.
It is clear to me now that any custodial wallet and any Closed Source software is going to collect and sell information about you.
This is the way. Closed source software such as Windows and centralized services such as Google and Facebook have spent years collecting and selling your data. Why would cryptocurrency be any different,
especially when governments are taking such an interest in controlling and monitoring it?