Imagine a world where people had enough cash to do those things without needing a loan.

No doubt it would be "inflationary" or some other nonsense, but the reality is that banking is a form of deliberate rationing and enforced political hierarchy.

The financial industry exists solely for its own benefit, at spectacular cost to everyone else - not just by making significant capital almost cripplingly expensive for most of the population, but also by acting in irresponsible self-serving ways which everyone else has to pay for.