I think we need to do defense in depth more. There was a funny pic in one of the sysadmin subs about buying firewalls from everyone and putting them in a chain, with each firewall labelled with which nation state compromised it. The joking idea being that sure, the U.S. has backdoors into your Cisco gear, but it you put that behind a Huawei firewall they may not have the backdoors to both, add in a Russian firewall and then an intruder needs all three. Funny but I think not so ridiculous these days if you are paranoid.