The US is 1.867% of the world's landmass, ignore Antarctica and you still have 95% of the world to see. It's a young country so the density of historically significant things even in major cities is pretty low compared to Europe and a lot of urban development is in fact suburbs (so roads and outlets and big stores). It's big so it's varied but take the same size of territory and check what you get anywhere else and it's the same thing... Heck, culturally speaking you'll have more variety over a much smaller territory in most of the world because countries are smaller...
I made the decision to not go to the USA anymore after 2016 and don't miss it one bit, plenty of awesome stuff to see elsewhere...
'roads and shops' is a bit inaccurate for the specific type of (sub)urbanisation in North America. Don't get me wrong, other continents, countries have types of suburbanisation and fragmentation as well.
The US are and were culturally really ahead in individual motorisation dependent infrastructure (and thus tourism dependent on individual motorisation).
Nonetheless, tankies don't really care about infrastructure given their history (largely contributing to individual motorisation). I guess buzzwording is happening as well ('yeah progress').