ok, let's redo this: instead of routers it's an IoT device. The router protects the IoT device from direct access so it is secure from majority of attack vectors - now an IoT device provider gets their server compromised and hundreds of thousands of IoT devices are now bots in a botnet due to the ability to forcefully push a security update.
I don't think it does outweigh the benefits, the real benefits would be punishing or/and banning vendors that do not secure their devices since using laws such as "timely updates" just promotes them to include sloppy (insecure) implementations for pushing said updates just to do bare minimum to comply with the law.
