Writers have no real area of expertise. They are merely generalists with a highly inflamed sense of punctuation.
Become an expert in one fundamental area of your market or business, no one starts out as a generalist.
Wanting to know all kinds of things is perfect for novelists, because novelists are generalists. We're not specialists in anything, except, hopefully, writing.
A tip for generalists who try to read economic research papers: If you get to a section that's incomprehensible, don't give up. Just skip to the next section.
If I am to be remembered, I hope it will not be primarily for my specialized scientific work, but as a generalist; one to whom, enlarging Terence's words, nothing human and nothing in external nature was alien.