Absolute nonsense. The US government is not a trustworthy entity and neither are its allies, as has been proven may times e.g. https://nypost.com/2014/02/27/uk-spies-people-get-naked-on-their-webcams/ . Following these revelations, which were even more widely publicized outside the FVEY countries than inside them, the world understands that the US government is untrustworthy. You might argue that no one cares about what the government does, indeed almost half of US voters (or according to some, more than half) voted for Trump again following his pussy-grabbing antics etc. But it’s well-known that in addition to being malicious and untrustworthy, governments asking for spying powers are also incompetent, as in coronavirus https://www.salon.com/2020/09/09/homicidal-negligence-trump-admits-on-tape-that-he-hid-deadly-threat-of-coronavirus-from-public/.
But on things that really do matter to people, like their privacy, everyone knows there are better alternatives to anything that might have the US’ backdoor spying tentacles around it, and it’s better to use those. If you try to put a backdoor in open source software, we can easily revert that, edit out the backdoor, and create international publicity.
Software is not like a physical object; it’s more akin to a shared recipe, a list of instructions for my computer - if this recipe now contains an ingredient I don’t want to eat, it’s easy to remove that unwanted ingredient (backdoor or blacklist) from my copy of the recipe and freely share the version without it, and everyone else can do the same and share their versions. Same if an ingredient we like is proposed to be removed.
What dishonesty and spying was once TOP SECRET SI, is now a matter of public discussion and policy making - for example, Privacy Shield is dead and gone, because of what we know, about the US government and the disreputable way they interpret their law.
All encryption ciphers, the building blocks, are designed to do one job. What encryption is about is encoding information with different symbols such that a third party cannot extract the meaning from those symbols. It’s basically like talking in a temporary different language, one that is created and used only for that one message or conversation. Call it “warrant proof” if you like, but what you mean is that you, an eavesdropper, cannot make sense of what (if anything) is being said. You absolutely don’t have a right to be able to make sense of what people say, or whisper in each others’ ears.
By the way, is the US still accusing Huawei and the CCP of backdoors? Or is that all cool now?