When your encrypted app is really doing its work. It WILL attract all kinds of shady people. That's why you don't go after encryption itself, but going after real-life criminals (like child abusers etc...)
This is an article about wickr.me and how it was closed down by Amazon after they just bought it out.
https://techcrunch.com/2022/11/21/amazon-wickr-app-shutting-down/