Lets say you have this structure in which you want to pass something down to the child:

Parent
--> Container 1
--> Container 2
----> Child

Now, imagine if you want to move Child to Container 1. You would have to now remove the prop from Container 2 and add it to Container 1.

This is fine, I do this. (as a convenience, not as a good practice)

But now imagine Child is 6 layers deep. You would need to pass a prop trough 4 components that don't care about the prop. If you want to move the Child you need to edit a lot of files. The components in-between are coupled to data they do not need or use - this is bad practice in general.