Exactly. One project I worked on a while back involved me taking a big pile of very clever and complicated Matlab code and rewriting it in python in a way that made it easy to use from other projects and able to read a couple of additional input file formats. If you just look at the commits on that project it would look like I was responsible for 90+% of the entire thing, while in truth I was basically just doing transcribing and cleaning and had basically nothing to do with any of the difficult parts.