The warning is too vague. “May become visible” kind of sounds like Notion doesn’t know whether they will become visible or not.
It's definitely weasel wording. And moreover, it's honestly tiring to constantly have these weasel words carrying such weight, and then jackasses getting bent out of shape that they aren't given the benefit of the doubt anymore.
Also, to me, "anyone who can view this page" sounds like "anyone _in this workspace_ that can view this page", not "anyone _on the public web_".