That it is a human policy is true.
Celibacy is not a "purely human policy" but an evangelical counsel, based on the Bible.
"Not all can accept this teaching; but those to whom it is given...There are eunuchs who have made themselves so for the sake of the kingdom of heaven. Let him accept it who can." Mt: 19:12
Presumably, those who enter the priesthood think they can, and therefore they accept it. Those who cannot accept this requirement of the Church should not enter the priesthood.
And that's ALL RIGHT. There have been plenty of married Cathoic people have been proclaiming Jesus Christ for generations. And married protestant ministers have also been doing such great job - really great jobs - preaching the Gospel.
But this article misses the point when it says it's all about money. How pathetic!