There's no doubt that some particularly bad routers out there are vulnerable to RCE by default (usually because they have remote management enabled by default a

There's no doubt that some particularly bad routers out there are vulnerable to RCE by default (usually because they have remote management enabled by default and have an authentication bypass issue or some other dumb flaw on the login page), but it's definitely FUD to speculate that someone can wipe "all the routers on the Internet". Most routers are incredibly insecure, but a good portion of those vulnerabilities can only be triggered if you share a LAN with the router or have and can widely deploy a XSS/CSRF exploit.