I don't know why you think it's a generational thing. There has always technical people that filled in the gaps that the more extroverted management types didn't care about. How do you think things worked when millennials were still in diapers?
Uh... Unless you worked at the forefront of technology where more people probably WERE qualified, by and large these things worked on paper/transparencies I would presume. If PowerPoint and PDF were people, they are themselves millennials and gen z (ish) respectively.
Now, when millennials were about 10 you've got a decent point ;).