I'm no physicist, but even if the typical physicist has internalized tons of relationships expressed in formulas, students who have a cheat sheet of tons of formulas still have to frame the problem and then choose the right relationships to solve it, and hence they learn and grow the way we want them to. Maybe I'm wrong, but as a software developer, memorizing syntax speeds me up a little, but when it comes to the entire development lifecycle, the quality and length of time will depend much more on whether I framed the problem correctly and used the right relationships than whether I quickly recalled syntax. It's not totally apples to apples, but it seems like in the 21st century we can get so much more done if we focus on knowing where to look up information and have learned how to use it, much like how I look up APIs and design patterns as a routine part of my job and don't think it really slows me down to have to do that.