Look, I am that ops person sans the age. I desperately want to one of these mythical graybeards to show up for an interview but it just doesn't happen. I get "senior" UNIX sysadmins that can't write a basic Python script despite it being on their resumes [1], can't mock out a basic HA web architecture or a logging pipeline, and can't explain at all how Linux namespaces work.

We tried to hire someone senior for 8 months before giving up and just grabbing a junior dev that wanted to do infra stuff and trained him up. I have worked at shops with people like you describe but it seems they're all happily employed.

[1] Not whiteboard style, on their own time, on their own computer, not timed or watched. They can take a week for all we care.