My (good!) experience is that churches are very much about community, however, I believe there is an interesting point to consider about them as institutions of control. Moreso in the context of European history, but also perhaps in the context of megachurches as described in this article. Friedrich Nietzche proposed that Christianity instills "slave morality" which redefined "good" as altruistic, patient, meek, humble, etc. and "evil" as greedy, violent, jealous, etc. Prior to Christianity, Nietzche cites that European "human morality" equated "good" with power, ambition, wealth, etc. and "bad" with weakness, apathy, poverty, etc. While it's true that Nietzche is a flawed character, I'd say it's worthwhile to examine how these competing moral codes are present within Christianity. Historically, one may see the Catholic church, or the Church of England, as instilling the "slave morality" while their leaders enjoy the base morality for themselves. Consider the Spanish inquisition, the Salem Witch Trials, or perhaps even Manifest Destiny - which moral code was primarily practiced by those who led these, and which moral code was primarily practiced by those who supported them? I believe the same cognitive dissonance is at play with these megachurches. Just something to consider, not critiquing Christianity in theory, just how things have/are playing out. It's also perfectly reasonable as a Christian to critique "human morality" as the original sin which Christian morality attempts to solve.