If a group wants to covertly exchange encrypted messages then they still can - just get some open-source encryption software, make sure all your co-conspirators have your public key, encrypt your messages and attach them to regular email. Use steganography to hide them in funny cat pictures if you don't want to look suspicious. If you're "up to something" that's probably already worth the effort.
If you just want to have innocent conversations with friends, colleagues, businesses etc. without worrying about bots run by identity thieves and advertisers scanning them for leads, you shouldn't be forced to jump through those hoops. Nor should you be offered a "secure" messaging system for financial transactions etc. which has a secret, government mandated back door that's all well and good ('cos you trust the government, right?) until it leaks...
Well, the financial data is pretty important... and are you sure that your texts and pictures don't contain clues to where you live, when your home is going to be empty, the make of your mother's cat's first car etc?
Thing is, some nice policeman is not going to sit down and go through a million peoples' text messages and photos looking for words to the effect of "the heist's going off tonight" or "Joey, do you like films about gladiators?" - the danger is that some unicorn startup will sell them some clever AI software to sift through and pick out suspicious messages or photos, while talking down the number of "false positives" - which the justice system has a sad history of
not understanding the risk of (
https://en.wikipedia.org/wiki/Prosecutor's_fallacy).
Apple's previous porn-detecting scheme smacked of that.