Business people don't have to understand designers better.
They have to be designers.
Just like designers don't have to understand business people better.
They have to be business people.
Just like programmers have to be business people.
And business people have to be programmers.
Just like artists have to be sales people.
And sales people have to be artists.
Just like writers have to be marketers.
And marketers have to be storytellers...
[Related: I stopped giving a shit a long time ago]