This is exactly what a European friend remarked to me years ago. He thought us Americans were a bit unaware of just how good we had it compared to the rest of the world.
By contrast, many European trails have huts/refugios every 10 or so miles, so you can stop and get a coffee or a meal, or even stay the night. This means that not only do you not need to carry a lot of food you may not even need to carry your own shelter, which lowers the weight considerably. There is some stuff like this in the US, for instance the High Sierra Camps [0], but it's not the norm and it's not cheap (~200 USD/night).
[0] https://www.travelyosemite.com/lodging/high-sierra-camps
Europe and Asia have had tens of thousands of years to make alpine mountains inhabitable, and it shows.
But outside of that, the US has amazing diversity partially because it's basically an entire continent, but also because of an accident of settlement and weather patterns that large swaths of the west were available to preserve.
There was an article recently about how in the UK it's all about restoration because everything is or was inhabited, but in the US it's about preservation because so much was simply never developed at all.