My issues aren’t really with privacy so much as what the failure modes look like, and, more fundamentally, with becoming a passenger to my own life.

The problem for me is not the LLM reading it. The problem is the company behind it can most likely recover the sessions. That is a problem since they could share it with whomever they want. Even if they are fully incorruptable it's also not uncommon that they simply get hacked and all this data ends up on the open market.