Similarly USB cables that do not carry data lines

I think I disagree. I just (re-)discovered a couple of my cables don't have data lines a few hours ago, prompted by the earlier discussion. My initial instinct was also to throw them away like you said. But then I realized they're actually quite useful for any case where you want to prevent data transmission, whether due to security or other reasons.

Though these should be cut in half before discarding so that no one "helpfully" retrieves them.