Like I said earlier, it's the comfort and foot spillage issue I'm worried about most - if you have wide feet you know it's embarassing to think of being in a room full of people with your feet looking squished into a pair of unflattering shoes. Much like someone with a bit of extra body weight might feel concerened about wearing an unflattering dress. Does that make sense?
Frankly, this is about you being self concious. Chances are (and I don't exactly have the most narrow of feet) most people are going to be looking at the bride.
What you're saying makes sense, yes, it just doesn't mean that I agree with it.
In my opinion, it sounds like you've ultimately made up your mind about what you plan to do no matter what advice you end up recieveing.