Give me a programming related question and I could have solved it a two decades ago on paper. The expertise allows me to solve it with more efficiency today.
Similarly, there are things that lack of expertise help you with. You can see different perspectives. Have to research the topics fresh (find latest frameworks, etc).
I also think expertise is far more transferable than ever. I hadn’t driving a tractor in 18 years. But I was able to watch a few YouTube videos for an hour, go out and immediately attach equipment, start one up and get to work.
The internet is still amazing. To your point though, there are things I could miss that would get me killed (using a tractor), so a neighbor helped me with some tips after watching; expertise is still very necessary.