I think you should work on what you want to (day to day) with an eye towards solving bigger problems that you believe should be worked on. So if I believed tha

I think you should work on what you want to (day to day) with an eye towards solving bigger problems that you believe should be worked on. So if I believed that healthcare needed to be worked on but that energy and AI were what I was interested in doing day to day, I'd look at applying AI to healthcare and who is doing that and I'd look at how energy impacts healthcare. Maybe there's a NIH group studying power grid reliability or something. And then I'd try to find a way to work with many teams to provide that side-expertise in AI or energy if I was already an expert with those, or I'd try to find a full time job working on it.