Reach out to Eugen about that -- afaik he runs the @joinmastodon Twitter account directly or has someone helping him with it, but he's approachable about feedback.
"Safer social media experience" refers to user safety, i.e. moderation and safety tools like content warnings, phrase filters, mutes, blocks, and the various quality of life improvements to those features.
That's not what I think is being conveyed to the people I link that page.
They take those descriptions as it applies to their own posts, "your messages are safe".
When I am put in the position to need to explain that Mastodon isn't an end-to-end encryption platform I've lost them completely.