I'm quite happy with my Prius. I think it's a skill issue. Roof racks and a tow hitch on a normal sized car handle the vast majority of cases where people imagine they need a truck or SUV. But I remember a young couple showing up to buy a mattress from my roommate, and being flummoxed when the mattress wouldn't fit inside their Subaru Forester with built-in roof rails. I had to show them how to tie it on the roof. They never did return my rope... If you can only imagine putting things inside the vehicle or in the bed of a pickup truck, then having a truck or a big SUV must seem essential. What makes it even weirder is that the Prius has more interior space than a lot of SUVs.
I think by "light duty vehicle" the OP meant ordinary passenger vehicles. Under US law, essentially every vehicle with four or more wheels, under 10,000 lbs gross weight and no more than 10 passenger seating positions counts as one: https://www.law.cornell.edu/cfr/text/49/571.3 That includes everything from smaller vehicles like the Mazda Miata or Mini Cooper all the way to large vehicles like the Cadillac Escalade or a Ford F-250.
Edit: And by "force," I mean "price out of the market" relative to gas-powered vehicle prices.
Science is only a small factor in everyday decision making for most people. Art is not scientific. "Feel" is not scientific. The feel of "safety" is not scientific. Etc.
In reality - it's not even close. The charging experience is a disaster. The grid? I'm not confident, to put it mildly. Politically? Nobody wants to drive what feels like a Prius - light-duty vehicles are unpopular, and the last thing EVs need is anything that feels like politicization.