Yes, I know, you only watch Time Travel shows with negative portrayals of Time Travel.I still fail to understand how restricting communications to talking to your past self carries no risks to the overall timeline. Because it isn't about "oh, you're just a random civilian, your life being changed doesn't affect the timeline on a larger scale" but rather that tiny little happenstance events can and will add up until the mere fact of telling your teenage self something they weren't supposed to know yet could end up with the Enterprise having a different captain or a presidential candidate who would've otherwise won the election deciding to withdraw simply because your teenage self would make a different decision that would affect another person that would affect a third and so on. Annorax's crew in Year of Hell had to be specially trained to calculate the effects of any kind of interference with the timeline, because altering something that appears insignificant (e.g. deleting a random comet) could end up causing several parsecs worth of space not to be seeded with sentient life. There's a reason why the "time traveler moves a chair" meme is that popular.
On the other hand, if your life is so insignificant that altering it wouldn't alter the course of history, doesn't this mean that you could accidentally delete yourself from history and nobody would care? After all, you're insignificant, history wasn't changed, why should the government of the Federation waste the time and effort to restore you into existence? High school students would randomly disappear during temporal communications classes because something they told their past selves during the exercise actually ended up getting them killed, and the teacher would just shrug and say c'est la vie?
No thank you, I'd rather that we didn't talk to our past or future selves, period. All I see is the danger, not just to your own existence (you could end up screwing up your own life in ways you couldn't even imagine), but potentially a great deal of history.
Quite frankly, commonplace technology allowing people to talk to their past selves sounds like a story hook for a Black Mirror episode or a classic dystopian pulp sci-fi novel, because the ways it could go wrong are practically limitless. More likely than not, stories featuring this plot device in any form would turn into a parable on how all our past actions have led to us being the persons we are now and if we tried to change them because we think we are wiser now, the result would probably not be what we expect. Now where have I heard that before?
You never watch any shows with positive portrayals.
You're like every other Westerner who has a stereotypical negative view on AI and the evil AI overlords who will gain sentience, turn into SkyNet, and who will create the Robot Uprising to screw over humanity is the only possible outcome of the future.
Sorry, that's not how I roll, those aren't the only stories that I watch. I'm not such a pessimist, like you. I don't see everything in a dark light and see the worst possible outcomes for everything. I understand the dangers and know that as humans, we can overcome and make a better future with technology, hand in hand.
Not everything is going to turn into a Apocalypse because that's all your media ever portrays.