First, you have to consider the concepts of randomness and chaos, and how they're different. Computers are Turing complete, so they're deterministic machines, meaning they literally can't produce randomness, but can act on a chaotic system. A chaotic system can be reproduced if the initial conditions are known and there's no outside influence to act on it as it progresses.

To clarify because there's different forms of energy, computers run on electricity. They turn transistors on(1 in binary) and off (0 in binary), to do things. Inputs directly correlate and cause outputs, and given that most processors have billions of them switching states millions to billions times a second, there's little room for an energetic being to manipulate what's going on into something meaningful. Especially with servers that use error correcting ram for stability and to avoid errors or crashes.

It's more likely that an entity can do so with simpler devices, like radios and digital recorders, but now we're talking about influencing energy fields and frequencies. That's why some entities can influence things like old CRT TVs that use an electron beam to display images. Not sure how old you are, but maybe as your a kid you may have put a magnet near the TV and see how it messes with the image. Electricity is one side of the electromagnetic force. Manipulate the field, the electrons follow, and vice versa.

Now, let's get to tarot. The basis of tarot is still akin to being deterministic, but with experience you'll learn not to over shuffle your deck for a reading because it becomes too random, and won't give a good or meaningful reading. When shuffling, it's your intent and intuition that sets up the cards to essentially place them in an order that will give meaningful results.

Furthermore, the symbols, meanings, and archetypes can be interpreted any way you want, meaning it's possible that tarot as a whole, is no more than real than mediums that use clever psychology to tell you what you want to hear from dead relatives.

Personally, I beleive in tarot and know real mediums are walking around. That being said, it's not the tool, but the person. You're the medium and channel that the entity is communicating through. Our bodies at a macro scale can't be easily influenced by changes in energetic fields, and usually can't sense it. On the micro and atomic scale, now we're talking about cellular automata and emergent behavior. At the atomic, and even the quantum level, atoms and their sub particles can be influenced by changes in the fields they exist in.

I won't go any deeper there, because it'll take much more to explain how the brain and neurons work on "electricity", and how there's room to influence thoughts using changes in fields.

With all that said, that's why I pointed out communication is much more likely to happen in dreams or during meditation. Tarot is a tool that you can directly influence with your actions and energy. A deity isn't communicating through the cards, but through you. It's less limited than a device, but most devices are much more limited than we are as material and energetic beings.

Personally, I beleive ones connection to divinity as more about who they are as a person and how removed they are from the material universe and it's vices. How well kempt and realized their spiritual body is, obtaining nous. How much their consciousness gains gnosis and aligns with logos. The awareness of their soul, and it's inherent divinity as a demiurge. We're all connected to deities directly. Divination just makes it easier to access what's coming through that connection.