Agree here.

Emotional detachment to engineering solutions is one of the hallmark of the maturity of a senior engineer. Senior here means in general being separated from new and inexperienced engineers, not to particular title.

Then another level beyond senior is that engineers start to be able to have emotional attachment to engineering problems. It's like back to the beginning when someone is new and inexperienced. The difference is that the attachment now is about the joy of learning, instead of the frustration of feeling not be able to solve the problems easily.