Who's to say that they aren't purposefully using encryption that they've made breakable so they can read the messages while making it difficult for anyone else

Who's to say that they aren't purposefully using encryption that they've made breakable so they can read the messages while making it difficult for anyone else to do so (other than the intended recipient?) Historically speaking, Zuckerberg isn't trustworthy. The "Stupid fucks" comment from long ago should've been the first indicator of his shady character.