The first link is the results of a survey. The second and third links make the argument that churches increase the health of the people who participate in it.

The first link is the results of a survey. 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.