Have racial preferences reduced the number of black lawyers?

The Wall Street Journal reports:

Under current practices, only 45% of blacks who enter law school pass the bar on their first attempt as opposed to over 78% of whites. Even after multiple tries, only 57% of blacks succeed. The rest are often saddled with student debt, routinely running as high as $160,000, not counting undergraduate debt. How great an increase in the number of black attorneys is needed to justify these costs?

We wonder if the liberal establishment wants blacks to succeed.