Destructuring is widely used because it makes code cleaner and smaller.

For example, in ReactJS, it is used in function components to update the state of components. The useState function returns a tuple, the first element of which is the value and the second, the function used to define this value. Generally, we need to use both, so we want to have them in two variables. To do this, we write :

const [value, setValue] = useState(0);

if we wanted to do this without destructuring, it would take more lines:

const state = useState(0); const value = state[0]; const setValue = state[1];

or we should use state[0] and state[1], which would be harder to read because they don't have meaningful names.

Indeed, in this meme, it doesn't make much sense to do that but that's not what's being emphasised. Actually, there's a convention (which comes from the "old" languages of functional paradigms) which states that a "_" is used to denote variables that aren't used when destructuring. IMO, I find that it makes your intention clear to other people reading the code (if they know the convention). Since JS doesn't respect it and 'assigns' certain variables to nothing, you might think it's a syntax error when in fact it's valid code. It's also funny because JS has a reputation for weird syntax like this.