If the same thing happened today I could just shrug it off and carry on regardless.
I am not rich now but I have spare cash and this makes an immeasurable positive difference in ways one cannot conceive without the benefit of an alternative experience.
* If you're broke and the car breaks down, it's both a car crisis and an extra financial crisis (need money to fix the car).
* If you have enough money saved and the car breaks down, it's merely a car crisis ... and, given that you're capable of fixing the car, it's less of a crisis, at that.
The whole dynamic changes.
For example, I live in Canada and unless you life in the capital of the province everything is really far away.
A lot of people live in cheap apartment blocks of rural areas and it can be a walk of pretty much an hour to get to the groceries store. There is public transit but it's usually every few hours instead of a constant traffic, so you have to plan your entire day around it.
I do agree with your main point that public transit should be one of the main investment of a country.
When I was unemployed for a while even the smallest problem was all-consuming because I had to worry about losing my last money and everything else.
The lows are very different when you have money and when you don't have money.
When you are struggling financially and a single event (e.g. car breaking down) can spiral into wrecking your entire life, you it's hard to "let go" of that.
When you are financially stable there are a lot of frustrations (e.g. work stress) you can learn to cope with, control, or let go of.