Dr. Courtney said:
Sure, the audience is very small, but I was betting it included the math judges at ISEF. After one completes an advanced degree, I don't see much advantage in listing or demonstrating LaTeX skills any more or listing it on a CV. I also don't see an advantage to listing proficiency with spreadsheets, presentation programs, or word processors at this level. But for high school and recent college grads (BS level), employers are interested in practical skills that set candidates apart. Learning LaTeX demonstrates that a student or recent grad has done some things that will set that job candidate apart.
But for advanced degrees, knowledge of typesetting software will impress few. It's assumed that most folks with advanced degrees became proficient in a bunch of technical software along the way and can pick up simpler stuff (like LaTeX) very quickly. Odds are, employers would be more interested in a candidates experience and abilities with more advanced technical packages much more essential to day to day work than LaTeX.
Humans are funny though. We often key in on certain things we observe and our biases often ascribe more positive or negative connotations to things. I think most math and physics folks who have used LaTeX a lot are more likely to view authors and documents favorably that are produced in LaTeX. But it's more like wearing the right tie to a job interview, and stating LaTeX as a skill in a MS Word CV is not the same.
As a side note, I was surprised recently when mentoring an 8th grader in a science project that the student had never used a spreadsheet. An older student helped him download LibreOffice, and we got him up to speed quickly using a spreadsheet to quickly accomplish his data analysis functions. By the end of the first day, he had 26 tabs open and had mastered stuff like average, stdev, count, sqrt, min, and max for analyzing his data. Fitting to a power law was a bit of a stretch for him, just starting algebra. This is now a skill that will have him ahead of his peers for a while, but likely not any more after he completes his BS and has worked for a few years.