Only because they've never had beans on toast. Well because they've only ever eaten American style baked beans.
Do Americans even have toasters, they seem to think that a good breakfast constitutes a pile of butter and syrup, so I'm going to assume that they're not prepared to eat anything that doesn't have 300 kg of sugar in it.
I'm American and I think food in the UK is awesome. I don't like everything, but what I do like, I really like! Plus y'all have cute and silly names for everything, it's great. I'm sure most Americans would feel the same way if they ever get the chance :)