Earlier quoted context omitted.
It's protective against downside, but can constrain your upside. I was raised a saver, and it's been very hard to hire out simple tasks & let go of trifles, which in turn constrains how much time & energy you have to focus on increasing your earnings. As a low earner, it's better to focus on efficiency & DIY, but as a high earner it's irrational to spend an hour getting bent out of shape over a few dollars.
Absolutely agree, which is why, for example, I don't do my own car repairs any more. But you can still have a less fancy car and keep it longer. And I don't want to focus on increasing my earnings. I'd much rather be fixing something around the house.
Next level is to hire people to manage it for you, but this is completely different level of income.