So because it satisfies the suits, he should reserve passing judgement? Try again; he is a programmer, not a suit. Hint: there exist many seperate but equally valid systems for judging worth/merit/quality.
Also, even for a suit, "Maintainability is only a concern once lack of such starts impacting your actual customers." is only true if by "actual customers" you mean shareholders. If you really want to get down to it and make an obnoxious out of place point, you can technically fuck over the customers all you want so long as doing so does not actually hurt the business (meaning: hurt the shareholders). Bonus points for figuring out how this could be done by a consulting company.
If you are a money-chasing robot, perhaps. Most businesses care at least a little about making a good product/satisfying their customers. That's good. Making life easy for your employees at the expense of your customers? That's bad.