The OP asked for opinions and people offered them up. I can't imagine anyone who went to a party with a hot dog bar as the main course would be anything less than gracious to their host for inviting them. I know I wouldn't be.
That being said I don't eat 80% of the things the OP listed that she would be serving. At a party with that kind of menu I'd put a little bit on a plate and probably push it around and then spend most of the time socializing.
I'd thank the OP for having me and if another invitation to a party was extended I'd graciously accept.
That doesn't mean if the hostess asked my opinion on what to serve I wouldn't make some suggestions to help round out the offerings.
Nothing wrong with your opinion. You sound like a gracious guest - unlike those that said they would refuse to eat. I thought I was clear that I was talking about those who called the OP rude and cheap.
Did you see the recent issue of Food Network magazine? The had 50 different hot dog toppings. Some of them sounded, and looked, really good! (Sorry if this was mentioned but after reading the first page of replies I decided to skip the rest and just post my own) Definitely not just a kid's food.
, why shouldn't the hostess be gracious and offer something else? 

Hot dogs just don't sit well with my digestive system.