It literally isn't though. Data flow control is not some "nice to have" feature. You, as a human, literally don't know what information is being sent over NFC, Bluetooth, and USB. Unless you use a highly sophisticated hub that is essentially a clone for data passthrough.
I am still waiting on Semisol to give the non "trust me bro" explanation on why these devices are insecure WITHIN their use parameters. Secure elements without a broadcast mechanism, without code that (absent authorization from the owner) diseminates the secret, or a cryptographic flaw making it trivial to brute force, WHAT exactly is nostr:nprofile1qqs99d9qw67th0wr5xh05de4s9k0wjvnkxudkgptq8yg83vtulad30gpz9mhxue69uhkummnw3ezumrpdejz7qgkwaehxw309askwemj9ehx7um5wghxcctwvshsz9thwden5te0wfjkccte9ejxzmt4wvhxjme0e68ksk referring to?