Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. You must not lose faith in humanity. Humanity is an ocean if a few drops of the ocean are dirty, the ocean does not become dirty.
I know of no religion or sect that has done or is doing without a house of God, variously described as a temple, a mosque, a church, a synagogue or agiary.