You can apply the same argument to wealthy dense neighborhoods in affluent areas full of designer coffee and organic produce vs dense neighborhoods in poor areas of a city with monthly food poisoning at local restaurants. Vast difference, go check Latin America for examples of terrible dense neighborhoods.

My argument is that not even nice dense neighborhoods are that nice compared to nice suburbia.

It's a matter of the person's life values and I believe the majority wouldn't necessarily pick the nice dense neighborhoods over nice suburbia. Also, I'd pick bad suburbia over bad inner cities.