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?
What you're saying indicates you're one of those people that don't understand how many gaps other people are filling in for you. You're talking about splitting PDFs, who do you think designed the PDF format? Or the http protocol that you use to open that google doc?
Honestly the issue I see happening lately is that because iPads (and now AI) made things too easy for the young people they don't actually know how things work at the low level, not interested in learning it, and often react with "this is too complicated, make it easier for me!"