Engineers often overestimate how bad the “greenfielder” is for the business. In most cases you aren’t selling an elegant technical solution, you’re just selling a solution. And if you don’t ship it ASAP you won’t have time to worry about maintainability, you’ll be bankrupt.

For most businesses, a greenfielder is a 10x engineer.

(This is just an aside, I agree that there exist “true” 10x-ers having had the joy of working with 2 of them over the last 20 years).