Because I would test if it's keeping its word, like periodically or spontaneously asking both whether it can _import_ the context from one chat to another or, judging the conversational flow between topics.
Maybe we're on different wavelengths on this issue but practically speaking, it hasn't spilled or splattered contexts from different chat topics.. yet.
If it had access to its own settings, and it wasn’t making things up, and it wasn’t lying… but why would it be trained on any of these things?