Yes, as an Englishman, it is just culturally and historically alien. My dad wore morning dress and his dad before him etc etc. If I marry I don't think I will. It would be an excuse to commission a lounge suit that could actually be worn on a daily basis for years afterwards. Even my dad only had one other opportunity to wear morning dress, at a certain garden party and that was some 35 years later, with considerably more girth. Thank God he rented.
Back to black (tie). It just doesn't seem right to me because I am accustomed to Roman Catholic and C of E weddings that are quite formal and lengthy. To turn up to mass in a dinner jacket is a little louche. I associate (rightly or wrongly) evening wear with dinner, cocktails, parties and informal ceremonies (awards). Outdated maybe but wearing a black tie rig is basically stating your intention to party, not so much to give vows. Perhaps I have just seen too many films from the 1920s and 1930s... To my eyes, it's just incongruous and gauche but I admit that is entirely cultural and as distinct as a groom would dress at a Hindu ceremony.