There are very different constraints on something portable, like a phone, laptop, car, or even plane, compared with something like an electricity grid.
You need to have high energy density for cars, planes, and phones. You don’t need high energy density for a grid. What’s more important there is scalability and reliability.
No, they’re right. The last thing anyone in crippling debt of any kind needs is more debt of any kind.
This is a bad solution.
A good solution would be for people not to go into crippling medical debt in the first place.