A company with a reputation for quality can charge more, because you don't need observers and can just rely on them. And they want to deliver on the reputation, so that they can keep milking it.
JS Mill has some interesting observations going back a ways.
Auditing is still recommended.
Ignoring auditing for a moment:
The trustworthy reputation is quicker to build, if the quality of the product is easy to ascertain quickly.
But if you are a company in a sector where that's not possible, the reputation for quality becomes even more valuable.
And you can potentially ride it out for a long time in an exit scam. https://en.wikipedia.org/wiki/Exit_scam
A company with a reputation for quality can charge more, because you don't need observers and can just rely on them. And they want to deliver on the reputation, so that they can keep milking it.