That's how I saw it. Life is difficult enough, somber enough. When joy breaks through it's a salve to the bruised soul. Marriage between and man and a woman should be joyous, it affirms the best of what God created man to be.
But there's a delicate balance between self-indulgence and joy. I do not believe this celebration transgressed the line from from joy to mere self-indulgence. I can't articulate why, I can't put it into words. But I never detected a false note.
The joy we're talking about is actually "making a joyous sound unto the Lord." Such celebration is actually a form of worship loved by God. So it should be no surprise that to witness such a worship would bring a reassurance in one's heart as to the rightness of it, since none other than God would reflect that joy in our own hearts as well.
If that sounds like I'm saying that God actually speaks to us personally as joy in our hearts, then good - that's what I meant.