Well, I can't say I have all the details in front of me, so maybe there's a bit more to it, but the theory does indeed wash with the courts. That's why there have been so many huge payouts lately. I know the issue of whether the system of the church turns one into a pedophile vs. providing a place for already-pedophiles to flourish was dealt with in at least one of the trials, and I don't remember.
Just because YOU might not be moved to such actions when placed within the confines of strict rules doesn't mean someone else might not. Remember, the priesthood draws a very certain type of individual. I don't mean for a second to suggest that it draws someone who's a pedophile, or even has the slightest tendencies. But it draws someone with a personality different from that of most men.
I was looking for something to back up what I'm saying, and couldn't find it, but did come across this interview with one of the lawyers at my dad's firm, which discusses the systematic protection of known abusers. It gets into that about halfway through. Remember, the lawyers have subpoenaed and consulted documents from the Vatican down to the bishops and diocese that document this - it's not just accusations.
http://www.cbc.ca/fifth/goodfather/interview_talach.html