Need to understand inline function call with react FC

Question

Im quite new to React and have created a new view at my company. I use inline functions because many guides do the same. Everything is written as function components.

I write onClick like this:

onClick: () => onBackClick()

My co-workes says this is a usless arrow function.

Will try to give you the whole picture. Parent component has the onBackClick function declared

const Parent = () => {
     const onBackClick = () => {backOff}
    
          <Child {...{onBackClick}}/>

}

const Child = ({onBackClick}) => {
 return (
   <MyButton {...{onClick: () => onBackClick() }}/>
)

}

My co-workers want me to write it like this:

onClick: onBackClick

I dont get a good explanation on why and really would like to learn. Can someone be kind to explain why this is a better way to write it.

Regards.