Seems like you've combined two ideas for no reason.

I can agree with "focus on one thing, miss the rest" but I don't think it's inherently human. If one of my cats has found something to stalk, they become hyper focused and pretty much oblivious to anything else happening around them. Other animals' ears will perk up as they try to find the source of a sound and determine if it is predator or prey.

We're certainly smarter than other animals, but is it really because of focus or just more mental ability?

It might actually be the oposite. An ancient human trying to dig a hole with their hands got bored or frustrated by the task and started using a stick to make it easier. Whereas something like a dog will keep focused on digging that hole until its exhausted or got what it was after.

You have convinced me sir and im out to get some weed and shrooms.

You don't focus blindly on your feet and invent stuff. You watch someone else do things and you copy what they do. You are standing on a very large pyramid of hobbits. The big brain is mainly to remember what everyone else has figured out years ago.

You can have many shower thoughts, and most of them will not work out. But don't stop having them, because eventually you will stumble upon something of value. Then you get to tell your grand-children, and they will listen and copy what you did.

We haven't discovered who controls the seabed yet

Science and engineering are iterative processes. Written language is absolutely key because it allows for asynchronous communication. This facilitates people building on the work of others, even work that was done years, decades, or centuries previously.

I don't know man, have you seen an animal try to fit into a hole in a cage/fence/wall/door when they could've easily walked around it?

Talk for yourself.

You lose focus on boring things that don't have mental stimulation such as information or pleasure. You are distracted, therefore you are squirrel. Parrots have been recorded making tools, not just using tools. Therefore, they are human.

Humans are the only ones writing it down, spreading the most thorough forms of communication the planet has ever seen. That's your superpower.

Are you suggesting that other animals are less capable of attention focus? Because I share that experience.

Focus is inherently reductive. I mean, your perspective shrinks.

Given a dozen things, focus on one. This ignores the other 11 and brings a great depth and clarity to your view of the one.

In the depth and clarity you see the one in greater detail. What was simple is now a complex. A new dozen things.

Now focus on one of those....

And so on. Shrinking smaller and smaller.

The ignored world disappears and is forgotten. How far have you come in this process? It's a good question.