The FBI here only represents the 'legal' government and not the world of secret courts and the NSA.
The NSA did infact try to build backdoors into important hardware and software standards. They did push companies into using worse crypto. The do massiv port scanning and build themself botnets from where thet attack other nation states. And thats just a tiny fraction of what they do.
So yes, I absolutly do need computer hardware and software that even the manufacturer cant break. Low level security for boot and authentification is only the first in many, many steps that we have to take all the way up to imroving usability in end user applications to make it hard to do the wrong thing.
The FBI are not the o ly player, all governments want such control, all governments have things like the NSA. Even private actors are getting better and better.
We do need better security to protect the integrety of all our data, this includes all our communication and even, if possible metadata that we produce.
