If you can get stuck in a mindset by following a specific trajectory of action then it doesn't matter whether you're following somebody deliberately or just blindly finding the same path.
In fact, reading what somebody did will often help you avoid going down a path. I've read of many many more algorithms, successful and unsuccessful, than I've ever implemented.
> You don't really understand something until you implement it.
Yup. We've already established that one has to prioritize what to implement. The priority clearly shouldn't always go towards doing something rather than reading what somebody else did. (Children would never learn to write that way.) Instead we prioritize differently at different times, and we try to have lots of feedback between reading and doing, by things like active reading.
