If you write as little code as possible you would still do it wrong. A working prototype won't follow DRY, etc.. So mostly it will end up with more lines than a good prototype would be.

I mean nobody is perfect, some design decisions are mostly wrong at the first days, but that doesn't change anything, as long as you can keep running and that's what running at scale means. Drive a car with 140 km/h and replace all parts while driving.