They warned me that they activated it, so it wasn't silent, it was just opt-out (not that it's particularly better, but let's use non-clickbait terms)
"I didnt get your email. I have not logged into my account lately."
It seems like semantics. You expect facebook to send an EXTERNAL notification to an operating system like ios/android or to an email provider like gmail/hotmail. Other people consider it not silent for facebook to make sure it shows up in their newsfeed.