> Good software engineers who are arrogant about easily acquired domain knowledge

This is a problem of arrogance, not of domain expertise.

Having worked in a few different industries, I'd wager that for the vast majority of them, a competent person can probably learn 80% of the required domain knowledge in under 6 months. For the latter 20%, as long as the person is not arrogant, they will seek help from colleagues who have been around for longer.

On the other hand, solid engineering principles will take 10-15 years of actually experimenting and learning in practice what makes a system resilient and durable.

"The first 80% is easy... it's the second 80% that gets you."