Blindsight is a part of our nature. It's an artifact of our brain taking shortcuts.
We don't see what we don't expect to. We don't comprehend nor consider what we can't grasp as important. We just filter it out like a noise.
Be it watching tv, reading books, talking to people. Anything and everything that is relevant to our perception.
We skim through the incoming information and pick only small pieces that we anticipate to be worth of our attention.
That's the reason why there is always so much entropy in human communication. Now we're shifting to digital brain era. Amount of information we produce and feed has never been so cheap and available.
Significant amount is produced every second for the needs that can hardly be worth it. Often shooting canons at flies.
Eventually, there is no observable way for it to slow down. Now you leave digital trace everywhere you go.

Heuristic analysis is becoming more and more way to go thing in the era of encryption, privacy and security. Every message you send is encrypted and secure, but at the same time very much traceable.
Those, who has access to the network activity, can make conclusions on who you are; who you talk to; do you send them - text, photo or video. Every internet shop has ton of logs and info on you. Combining that private info with encrypted info, one can make very accurate guesses. Given, they ask very specific questions.
Is this person a man or a woman? Is this person a punk or a sheep? Is this person going through something recently in their life? Yeah, your ip never sent a traffic anywhere besides fb messenger.
Yet, recently you started sending more requests through telegram.
Then there appeared some deliveries to your address. Did you buy something through telegram? Maybe. If that's true, what lead to that?
You've got some new friends on fb recently? Had some unusual interactions there? So on.
The chain of interactions is huge, and one with access and time can mine all sort of information out of it.
Welcome to the digital era.

The amount of data processed will grow so big, it will become utterly useless to handle it concisely.
Tools will be developed; algorithms gonna kick in. Terabytes of data for each individual, flowing in a matter of minutes.
Most of it will be filtered and thrown away as insignificant. Essay converted into a short resume. Short sentence thin for context.
Did you know it's possible for your mind to express the entire book's meaning in one sentence if you had to put it to that limit?
It can even convert an entire book into a single word that your brain consider most resonating with the meaning of that book.

To you.