I thought a similar sort of idea went through the heads of, say, Martin Luther, or John Wesley, or George Fox, or others, who went and broke away from mainstream religion as a reaction against what they saw as its problems, or hierarchy, or "apathy", or anyway some problem with the organisation. Of course these have now turned into their own religions (or denominations of a religion) -- eventually people seem to need an organisation to keep their ideas going.
Moreover, since there's no reason really even to believe in Judgment Day, nor a God in the first place, stripping away all the problems of an organised religion still leaves you with something that in all probability is wrong (or, at least, unnecessary). Even if the world did become a morally better place, that would be based on a falsehood and could not last for long.