Seems to me the problems are (1) the "assistants" aren't anywhere near good enough to be trusted to make the right decisions, and (2) a trustworthy assistant isn't compatible with the adtech business model, so it's unlikely facebook or google would produce such a thing.
Yes, why wouldn’t I? I could also give them parameters like “if I’m more than 20 minutes late please re-schedule this” or “if my flight is delayed please let everyone know it’s delayed”
Why wouldn’t I do that? Presumably the person hired is competent to make determinations within parameters specified.
I could also let them know when it’s inappropriate to do this. Again, they should be competent enough to discern the differences between when it is and isn’t appropriate.
This could honestly be done by an algorithm if you give it the correct inputs and outputs and it could be fed updates, the only real limit is the fact that some of this isn’t exposed via an API either in a timely fashion or at all
That years of training is what we are missing. I don't think modern AIs can be trained in the way the assistants of old could be, at least not yet.
Having one running locally helps but it's still necessarily storing information that you might not want to have stored where someone could potentially retrieve it, either via some sort of exploit or by forcibly compelling you to give it up.
Being able to collate the requisite inputs from outside sources is the real problem. If you can’t do that reliably it’s simply hard to build an algorithm around it. Flights for example would require your calendar program to reliably pull data from an API regarding the flight information that is current and effectively real time. That’s the actual hard part, and this expands across services.
For all the advances we have made with computers and smartphones in particular they suck at meaningfully exposing a way to collate data sources and create actions around them reliably
The CEO would trust the personal assistant to do this if they have a deep trust in the assistance competence. They would also need to know the assistant has a deep enough understanding of the their preferences to not do something they don't like. AI can mirror that.
More importantly though there will be consequences if the human assistant makes a big mistake and books the wrong flight. They would have to take responsibility for the mistake.
The LLM is always just going to write in text it is sorry if it makes a mistake. That is never going to be good enough for anything of consequence. The LLM would practically have to be omniscient in a way that is not going to be possible in a world filled with uncertainty.
So much of human activity is built around the network of trust that another human takes the blame if something goes wrong. So much activity involves coin flips and that someone takes the blame when the coin lands on heads but we bet on tails.