I disagree. I cannot make you informed.
I can make information available, I can make sure it's complete, I can avoid tricking you or lying to you, but I cannot make you informed.
Unless there's evidence that the lender somehow failed to disclose something here, then it's the buyer's fault if they are not informed.
It would be highly illegal for a lender to represent a contract as fixed rate, when it is not.
Unless they did that (and the "journalist" her didn't bother to ask that), then it's the borrower's fault that they thought it was fixed-rate.
On the other hand, it's just the "journalist"'s word that they thought this, the video doesn't show her saying it, it's just a voice-over. So how much do you trust THAT?
When I was in high school a guy in our neighborhood gave us the scoop on interest. It only goes up. His name was Angelo “Sonny” Mercurio.