The Church is made up of sinful human beings in constant need of redemption and forgiveness. After all, Jesus chose, as the leader of His Church on earth, the man who he knew would deny him three times, when the going got tough.
Some of those sinful people are men who hear a call to the priesthood. I have no illusions that any priest is a perfect human being; my parents taught me that they deserve my respect, as long as they continue to earn it, but they're no holier, or better, than anyone else.
I know that some priests will disappoint the Church, and her people, but the vast majority serve God's people with willing and cheerful hearts, and these men deserve our continued thanks and prayers.
I don't think the argument is whether or not priests are perfect. I think everyone knows they are not. No one expects them to be, but we certainly don't want them to fall below what good society regards as wholesome.
There is too much of a belief among many that enforced celibacy ensures some kind of higher spirituality. This is not true and other branches of christianity know it.