My viewpoint lately is that is because institutions are set up by man not God, despite man's ego-laden opinions about how their particular institution is indeed God's main and only vehicle on earth to get His will done. That's man's delusion and hubris talking.
Christianity is not for institutions. It is for the common man. The poor, downtrodden, sin-laden common man. It is meant to be shared, for free. Not for a man to build up his own tower of Babel based upon it.
If Jesus came to virtually any institutional Christian organization based upon his name today like he did on earth as a simple man 2000 yrs ago, he would probably be cast out, much like he was by the Pharisees and rejected by Israel and their institutional religious systems and structure of the time.
So my conclusion is pay no attention to the false posturing of man and the institutions he sets up in God's name. We already have a mediator, and that's one for the common, the downtrodden, the broken. And he mediates for free. We don't need another mediator like RFR, the Pope, or any other form of local egotist leadership setting themselves up as a false mediator, interjecting themselves between man, Jesus Christ, and God. Where you see a religious hierarchy, there will be evil. Run the other way. Hang out with the sinners, like Jesus did, and keep your heart pure.