But regardless, I've seen this argument plenty of times. However, I don't know how much tinfoil is in that hat.
On one hand, I would not be surprised to learn that some of the encryption standards have backdoors in them. I'd mostly be interested in how they kept it secret for so long. But does it even matter? You're worried about backdoors in the algorithm for encryption when that's just a single link in the chain. To my knowledge, backdoors in various NSA encryption types have only been suggested and theorized about. However, we already have real world proof that hardware and software backdoors not only exist, but have been used. So, worrying about encryption being backdoored while chatting on a smart phone chock full of chips like the modem which has direct access to your phone's memory and has internet access doesn't make sense to me.
But on the other hand, unless you really piss off someone in the government, they are not likely going to be worried enough about you to use any of those tools. What we really need to be worried about is any aggregation of the data about you into groups. Most likely, they can already form these groups (and let's face it, likely already are) from freely available data we willingly post online. History has already shown they don't need to use their AES backdoor to discover you are likely an "undesirable" and should be deported / placed in a camp. But even if it was hard, an intern could probably slop together an AI to scan a person's online posts and develop a persona, and that's good enough.