The scandals are part of a long-simmering neglect of important theological issues regarding sex and sexuality.
The same people who agitated for altar girls are the same people who agitate for the Church to "be welcoming" to homosexuality and the same people who introduced altar girls into the churches are the people who shifted pedophile priests from parish to parish.
As I said, it is all of a piece. When the priesthood and the sacraments are not taken seriously, traditional morality is not taken seriously either.
There is a parable about the servant who was faithful in small things.