If you fall on hard times, it also often doesn't make a hell of a lot of financial sense to sell your vehicle. Doubly so if you do use it to make money. Even if you can get something cheaper, that "something cheaper" might be less reliable, which can lead to losing work—transportation unreliability is a
very common element of poverty stories, frequently messing up opportunities or causing major set-backs. And it's not like you're going to get that entire $80k (new) back by selling a used truck.
Requiring or expecting that people burn through all their material resources before getting help isn't how you get people out of poverty. Such requirements are a part of America's "poverty trap" and also cause misery in the disability system.