The US hacking Iran’s centrifuges would have been preventable though with careful device management as far as I understand. The worm they used, Stuxnet, didn’t come from nowhere. It either came from a USB that hadn’t been properly sanitized or their systems were connected to an external, unprotected network when they definitely should have been isolated. That’s a preventable virus and unrelated to conversations about backdoors being built into technology for governments to access.