It wasn't "designed" for or against anything American. This is a purely Japanese design designed to Japanese tastes that has historically seen enough success in American markets that Toyota's market research has deemed the juice worth the squeeze to begin manufacturing them in the US to get around the Chicken Tax that previously made them prohibitively expensive and sell them to fleet purchasers. My local university had 20 or so Daihatsu Hijets running around until (I assume) parts supply dried up and they were replaced with far-more-expensive Ford Bronco Sports and similar compact crossovers.

The nice thing about a minitruck over something like a Gator is you get an interior.

I worked golf course landscaping during some summers in college and drove Gators, which did their job well. But they certainly weren't any relief from being out in the sun all day. This Scion minitruck has heat and air conditioning. And locking doors. So it'll be a respite from the outdoors, as well as a secure (well, as secure as any car) place to leave your personal items.

The concern I'm imagining is that once you start offering much smaller pickups, they could potentially get customers thinking that maybe the bigger pickups just aren't necessary. You already see a bit of this if you look at the discourse around kei trucks and the smaller ute-sized Ford Maverick. The end result would be a cannibalization of the full-size market by trucks that are much, much lower margin.

Right now, if you want certain things in a truck in the US and Canada, you must buy a full-size, even if they could be offered as features on smaller trucks that would not justify the same MSRP in the minds of customers. I think this is part of why we don't see any real competition from GM or Stellantis to the Ford Maverick almost three years on. GM would rather you buy a mid- or full-size truck, and Stellantis doesn't offer anything other than full-size Rams.