My understanding is that most of those things are log-able, which is all we really need - to be honest, I’m not sure I trust myself not to end up looking at a user’s messages page on accident and then just move on as if nothing happened, which in our case could be harmful (in particular, we don’t expect it to be a security risk, but an integrity risk - ie, longterm damage isn’t done as long as the user who has gained access to this knowledge is open about it and recuses themselves from relevant topics).
It would certainly make it much easier to ensure nobody does this on accident or on purpose without then reporting it if it were logged with all the other ways they could access the same data.
If those things you listed aren’t log-able then they really should be, but even so it would only help against a malicious admin and not a slightly careless one