Too many “back doors” are found in software and hardware. I think government agents have planted a lot of these things to use against U.S. and foreign computer users. Some through paying off the development company, some through maybe appealing to their “patriotism”, some through agents working in the industry. Too many found all the time to be accidental.
I was at a developer's soiree, long ago, and the discussion over drinks was backdoor security in e-money. One major e-money developer told me flatly that there literally was no value in marketing e-money without a government-accessible backdoor. And when I asked about user security, he just laughed.
Obviously you have never worked in software development.
I develop daily. It’s complicated tying a lot of functionality together in a single entity. Exploiting one of these exploits hard! The code and who wrote it is all tracked. Most of these exploits are good intentioned code...with a blindspot.