I can see them exaggerating, and using extreme pathos to convince you, in a mere dialog, of the need for donations.
At worst, yes, their pleas could mislead the naïve. But they are extremely careful in their wording, and if they were outright lying, then they would suffer for it, perhaps even legally.
It's interesting, because many of the dialogs I see here are actually appealing to people who read Wikipedia the most (and don't edit it.) So I would say that's a good and targeted appeal to the freeloaders.
I am open to correction on this: if you can find a dialog from WMF that outright lied and told a falsehood about a material fact, then show it to us, and prove the fact. As we say, [citation needed].
I'll start you with a helpful image search: https://www.google.com/search?newwindow=1&sca_esv=558977329&...