If a programmer is not responsible for the long term maintenance of a system he builds, view him with suspicion. 80% of the blood, sweat, and tears of software occurs after it's been released - that’s where professionals are born.
80% of the blood, sweat, and tears of software occurs after professionals maintain system that was builts. The rest of the 30% is when experts comes in and find a better solution that will make life easier for programmers and professionals.
It takes 110% for the software to function. Now you know how the last 30% is important.