I completely agree with you, but I cannot lay all the blame at the feet of brides/ women. Gentlemen, grow a set of balls, become involved, and take ownership. This is the start of your marriage as well, and you have just as much right, I'd even say obligation or duty, to plan, organise, and celebrate this ceremony. The sad fact is that most men are only too happy to transfer sole authority and responsibility to their fiancées. Most women do not know the first or last thing about men's clothing, and are thus easy prey for the host of so-called "stylists", "experts" and wedding industry professionals that will bombard them with the latest trendy rubbish.
The decline of formality in our societies, especially in North America, has left women unaware of traditions, etiquette and convention, which conflicts with the desire to still have a "princess" moment. I truly believe if women had more access to formal and semi-formal events in their regular lives, the excesses we read about would not occur, as ladies and gentlemen could familiarise themselves with social conventions slowly and naturally. Perhaps I am completely wrong in my opinions, but I do not think so.
+1 for the most part.
I definitely agree that men should be more involved in these things. The problem is when you are a groomsman and the groom just outsources everything to his fiancee and doesn't have a lot of knowledge about these traditions and how formal dress is supposed to work. The average guy in the U.S. or most other countries is probably not going to disagree with what his wife wants on something like what the groomsmen should wear and you can only do so much. People on this forum are an exception, but you have very little control over things when you are in the wedding party and not the guy getting married. I'd bet most of the guys here who are bothered by having to rent a tux when they own a better one would never agree to wear a rented tux to their own future wedding.