That's stupid. Some bishops have been so, some are afflicted themselves with the disorder. Unfortunately when homosexuals find themselves in positions of authority they staff the positions under their control with homosexuals and it spreads until it gets rooted out which operation has begun. The Church does not just take out all the offenders and shoot them, however. It is a 2000 year old organization and thinks in generations, not election cycles.
The Church is chock full of active homosexuals (many of whom cannot keep their paws off of teenage boys), and the rooting out has NOT been started (or even really contemplated).