Meta's statement about eliminating encryption in Instagram DMs was disingenuous and misleading. Here are the real reasons it's going away https://www.platformer.news/instagram-encryption-meta-whatsapp/
This whole time I assumed that it had been turned on by default. I had no idea I was supposed to do anything to turn it on.
If the true intent is high adoption, users would open it, see a prompt, and click to opt out, just like most notices.

Opt-in by default.