Priests and bishops are human and sinners just as much as any of us, and Catholics know that. As for the Pope, he is too, and the only time his words are considered infallible is when he speaks "ex cathedra" which is exceedingly rare.
They are THEOLOGIANS and pastors, not non human angels. Of course, just as any other pastor, their congregations have the right to expect them to live as exemplary life as possible, and of course they are expected to be spiritual leaders. Most priests are just that - pastors who are sincerely serving their congregations while struggling with their own human weaknesses just like the rest of us.
And most Catholics understand this, just as most protestants or buddhists or muslims or whoever understand that their leaders are human.
This is not excusing criminal behavior IN THE LEAST. This response is not addressing pedophilia among 4% of the priesthood in any way. I am merely addressing the charge that a coverup by a minority invalidates the work and integrity of the whole priesthood.