Suggested by a section in a book by Gaku Yuzuru. Just as a football team plays matches both 'home' and 'away', in a game each player must fight both as attacker and defender.
Not making the most of home advantage would be failing to attack severely when the opponent enters one's framework.
A simple example.
When Black has played sanrensei, White can be quite happy with Black 2. Up to 5 White's group is close to being settled.