Not trying to offend anyone as this is a matter of taste, but I can't help finding the American "masculine truck" ugly and cringeworthy.

Maybe it is me being the from European Alps and having close contact with people who actually have to drive vehicles in challenging terain (for forest work and hunting). And those cars are typically the polar opposite of the pseudo-masculine big truck: You want them small, because where you go there are trees and rocks that won't move out of the way just because your car looks masculine. You want them light because you are moving across badly maintained forest roads, etc. You want them ugly because you will be scraping more things than you like. And unless you have need for moving bulk loads like water containers for alpine cows regularly a closed back is much more practical, at least in this climate (if you need to move such a thing, get a trailer).

Over here these trucks are relatively rare, and likely smaller than their American variants, and mostly driven by a certain type of man as what appears to be a fashion choice.

Maybe it is a cultural or generational thing, but to me a car is a tool and I don't connect a lot of my identity to it. That doesn't mean I don't like a specific car or don't like to be able to mainrain one myself etc. It is just that I like functional efficient machines and a big tank weighing many tons that you drive in mostly alone is the opposite of that.

Of course they are a cultural status symbol.

That said, mountainous forest work is obviously a more prominent use case in the alps than it is in the US.

US trucks that are owned by individuals are not primarily seen as tools. 70% of US truck owners have only one vehicle, so their primary purpose is to be used as a luxury barge and family hauler. Not much different than the huge cars that Americans preferred to drive in the 1950s and 1970s. There has always been a thread of huge cruiser style vehicles in American auto culture and this continues today.

When it comes to work, towing capacity and generic American suburbia workloads tend to dominate (large houses with big projects, longer drives, etc).

Not saying that these tanks are a "practical choice", but they are perhaps better viewed through the lens of luxury barges.

Hunting is a good point, but from what I've gleaned it's a subculture that sort of stands alone and has a huge "gear" component. I think that it's somewhat common to have small specialized vehicles for that use case, like ATV style vehicles of various sorts. Ex: last time I was in North Carolina I saw someone with this dune buggy thing suited for that... and it was being hauled around behind a massive truck, naturally. Off-roading and hunting culture also overlaps a bit, and there is a legitimate off-road culture that is quite separate from the Big Truck culture. These people will often have two vehicles, so the Big Truck would be used for the aforementioned luxury cruising and status, while as you said, a more suitable vehicle is used for the actual rough terrain.

They do have a fairly unique status power in much of the US. If a small business owner drives up in a sports car, they may get jokes, but for some reason driving up in a new GMC 2500HD is sort of seen as a mark of a "working man's success" instead of being flashy and showing off. It's something you can drive up and meet clients without about how you are going to look. That said, I'm speaking from experience in southern and midwest culture, but that's where the majority of the US population lives. When I was in New York you would see these monster trucks much less often, and as you said the driver was often much more ostentatious I'm trying to flagrantly stand out rather than subtly rise above without getting called out as one does in the midwest.