This is undoubtedly a factor, but how many of these other churches are having to sell off a lot of their assets to pay abuse claims? As I recall there was an Episcopal diocese in Canada that had a lot of abuse claims stemming from a home for children that they ran many years ago, but it's hard to think of many others. In contrast the RCC has problems in many states.
The Lutheran Church (ELCA) has its membership concentrated in a few states in the midwest where they are sometimes the dominant religion or close to it. If they were having as serious a problem as the RCC, there would be a multitude of abuse cases and diocesan bankruptcies in these states, but you don't hear about this from the media or the courts.
ELCA's chief executive or whatever is the rampagingly liberal Dr. Martin Marty. The MSM has no interest whatever in making Marty's life difficult. The Roman Catholic Church to which I belong has its problems and always has had one problem or another for two thousand years. Nothing new here. We will deal with it in house whether outsiders think so or not.