I wonder if it's the 100 hp and under size?
"Real" farmers here would have a 75-100 hp chore tractor or a SS for manure scraping and barn chores with the real HP iron with more serious transmission choices for multiple drawbar tillage tools and planting that much of the time involves roading distances to the field.
I think your right with the "market thing".
Could be. Here in Portugal specifically, "real" farming starts right at 50HP or even slightly less. A lot of people with small farms to sell at local markets at what not, don't really need an huge tractor, specially since a big tractor can't go where the smaller ones can.
All kinds of tillage tools, trailers, etc, just in a smaller scale.
That's why we also have higher HP tractors offered in a very small package. For instance, a Goldoni S110 offers 102HP in the size of a Kubota L60 series, or even slightly smaller and it has a 24x12 transmission. Same goes for several other specialized tractors available.
Roading tractors is a just something we have to do a lot, regardless of the size of the tractor, this also includes pulling fully loaded trailers all over the place. Right now, it's grape harvest season, so you would see all kinds of tractors on the road fully loaded with grapes. Even smaller 2 wheel tractor with a trailer.
What's interesting here in Portugal, is that the upper half of the country, can't really use a tractor much bigger than a conventional 150 to 200HP. Anything bigger, it just won't work anywhere. Lots of tight roads, small fields, hills, etc.
On the bottom half of the country, we have JD 9RX's working there, Fendt 1050's, Valtra S series and more of these bigger tractors since the country is a lot more flat and open down there.