There is a lot of truth here. I spent a number of years leading a Bible study at a juvenile detention facility. At my first session, it took me 10 minutes to discover the futility of the monologue and the benefit of interaction.
I led a Bible study in a church where we had four or five men and there would be significant work of the Spirit, open hearts and "real" Christianity. As soon as there were seven or eight, everyone would stop sharing and put themselves into the "I'm listening to a lecture mode".
I have seen "real" Christianity and the synthetic substitute leaves you craving the real thing.
Satan is collectivizing the entire world. He has used Christianity to accomplish this. In small groups we tend to show who we really are. We do this in our families. In large groups we put on a persona. This is the hypocrisy Jesus warned His disciples about.
Small groups allow the "warts and all" exposure that lends itself to real Christianity. The persona model does not want and cannot accomplish the interaction necessary for real Christianity.
Here is a link that describes some of what went wrong with churches.
http://christianpioneer.com/lib/rchurch/rchurch.htm
Those who cling to worldly churches and the comfort of the familiar, cannot be argued into seeing how much they are missing.
Instead of appearing to attack other Christians for being "wrong", it may be more effective to entreat other Christians to reflect on their church practice and seek in prayer for the Lord's leading in their lives.