Comment by hatmatrix
That study must have compared beginners in LaTeX and MS Word. There is a learning curve, but LaTeX will often save more time in the end.
It is an old language though. LaTeX is the macro system on top of TeX, but now you can write markdown or org-mode (or orgdown) and generate LaTeX -> PDF via pandoc/org-mode. Maybe this is the level of abstraction we should be targeting. Though currently, you still need to drop into LaTeX for very specific fine-tuning.