Because it's just kind of lazy, everyone has access to LLMs now. If they wanted an AI answer they'd just use Google and click "expand" on whatever summary it sticks at the top of the search results.
People use social media to interact with other humans, and unless we explicitely ask, we don't want to read through a wall of AI text.
I've been using Tutanota and Mullvad for like a decade now without any issues.
Tutanota in particular, feels like it's gotten a lot better in the last year or so. The inbox loads a lot faster and you can show sender info in the notification.