The vast majority of churches are net positives for their communities, this applies to _all_ churches. Are you saying the local Islamic centre, or protestant church should suffer because of the corruption in the Catholic organization?
Says who? Do you mean priests accused abusing people wont be taken to court/jail because they are priests? Because that happens all the time (just like with any other profession doing that).
Whether the Church advertises it or not, or tries to keep it from publicity, is something most entities would do. Companies don't advertise their members bad behavior either.
The second and third links make the argument that churches increase the health of the people who participate in it.
Neither says that churches are 'net positives' for a community. A church can easily make it's members healthier, while also hurting the larger community as a whole by occupying very valuable real estate while contributing nothing back to it's non-members.