Well, it's interesting to me.
Job title: network engineer
What I really do: code, solve a wide variety of problems MacGyver-style[1], debug other people's code, work on a vast array of systems from embedded to HVAC to electrical to cloud, crawl around in tunnels, attics, roofs, and spaces.
It's pretty demanding and intellectually-stimulating. It demands I be a generalist with a decent level of expertise about a wide variety of topics. It took decades to get here. Now I get joy out of mentoring younger colleagues.
I don't think I could work on any one thing for even a year.