React doubt: React.useEffect or useEffect

Hi devs!

The last days I was looking into some react repos because I want to implement a component library on my own. And I realized that many people now are using React functionalities via React object.

import * as React from 'react'

/*functional component declaration*/
const [count, setCount] = React.useState(0)

React.useEffect(() => {
 //some logic here
},  [])

What is the porpoise of this? What about just importing directly what you need?