AOG...by the time we get to our age, we have been to many weddings....I know I have !
But in the last 45 years, I don't think that I have ever been to a religious wedding, where the couple have been "religious" in any way at all. Its just a pretty place for the ceremony I suppose. Now that you can have a wedding pretty much anywhere you want, there isn't the compunction to use a church for scenic purposes I suppose. I can recall some awful weddings years ago, in bloody Registrars Offices, where it was all over in 5 mins.
Actually, I did go to a Hindu wedding about 10 years ago.....2 as a matter of fact....the civil and the Hindu one. I think that they were fairly committed, religion-wise.
I am fairly relaxed these days about the issue....if the couple want to get married in a pretty church, so be it....its none of my business.