They are our goal. Just one match one, or one good unquestionable ippon-worthy throw in Randori. Don't get me wrong, this isn't petty or vindictive, this is about improvement. It's about knowing that no matter how good your technique is and how much you've improved and yet there is still one person that it doesn't work for.
That person is the one person you want to play when it's time for Randori, and the one person you feel the greatest challenge from. You will try progressively harder with them each time, and for a while they might have their way with you.
Then one day, out of the blue. You throw them. It feels so good - and it motivates you even more.