I think Maher’s point is a lot more simple than that. I interpret his question in the context of the Gospel passage in which Jesus tells his followers to give away their Earthly goods in order to properly follow him.
One must be careful in throwing around Scriptural quotes. Our Lord also rebuked Judas for objecting the “waste” involved in Mary’s lavishing expensive oil to annoint the Lord’s feet.
Look, the Jewish Temple, which only contained the Ark of the Covenant, was richly adorned, the most extravagant edifice in the Jewish nation. Why? To honor the presence of the living God.
Our church buildings hold not a mere parchment, but the Living Son of God Himself in the Blessed Sacrament, and are sacred places where men are reconciled to God, baptized, marriages solemnized. Most importantly, it is the place where the Holy Sacrifice of the Mass, the most import act in the world, is celebrated.
Our churches rightly reflect the beauty and importance and solemnity of these realities. Our churches are not adorned for our personal vanity, but to honor God and His saints. We should apologize to no one, especially a moral midget like Maher, for adorning our churches.
Coincidentally, while honoring God this way, our Church is the most charitable institution in the history of the world. We know what great saints like Mother Teresa have done. What has Bill Maher done along the same lines?