This temptation to pound an EV into an ICE shaped hole is misplaced. An ICE with ~400 miles of range provides a regular benefit through fewer trips to the gas station. With an EV this becomes largely irrelevant. I can count on 1 hand the number of times range >300 miles would have been useful in the last 3 years and >75k miles of driving.
Just because it's irrelevant to you doesn't mean it is to everyone. If I were to count on my hands the number of times range >300 miles has been useful in the last 3 years, I would need more hands.
So the question becomes... how much is something worth that will only provide a slight benefit maybe once or twice a year?
Whether the benefit is slight or not depends on your driving pattern. The advantage of an ICE is not just total distance before refueling, it's also the ubiquity of the refueling network. As an ICE road tripper I don't usually plan a route that takes me through refueling spots and then decide where to eat based on where I need to get gas - that's backwards. I stop because I want to eat (or stretch, or whatever). I can decide where I want to eat first, with little regard to what gas station I will need to use, because gas stations are everywhere. Superchargers are not yet numerous enough to enable this pattern, so although the stop time can be similar, the choice of where to stop and what to do there is more limited than in an ICE. Out in the real world I do actually tend to plan fuel stops on road trips sometimes because of pricing considerations, so it's not going to be a huge adjustment for me to reverse my thinking. But that mental shift is going to be more difficult for at least some portion of car buyers. It may be mostly in their heads but that doesn't mean it won't influence their decision on whether to ditch their ICE. The argument about being able to fill up quickly and get back on the road is used because it's simple and quick, but the better argument is about choice, which is harder to put into words. Greater range more capably addresses the same problem as building out the supercharger network does - fears about the road-tripper's lack of choice, not their lack of ability to get where they're going.
If I'm headed to my sister's house in central California from Las Vegas, there are superchargers to help me get there with no problem, and it wouldn't take significantly more time than it does now with an ICE. But I have to stop where the superchargers are. Although I drive through Mojave and stopping there would be fine, I can't charge up while I get lunch at Stoken Donuts, because that's not where the supercharger is. On the way home through Barstow I can't charge up while I eat dinner at Idle Spurs, because the supercharger is miles away. More range and more superchargers will work together to ensure that my preferred choices are as available to me as they are to ICE drivers, without the double hit of stopping to eat and
also stopping to charge.
I'll be getting a Model 3 as soon as I possibly can, but I will be getting a long-range version if it's offered. And although I would be able to deal with a range under 300 miles, not every argument against it must be considered specious.