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 @semisol referring to?