Mechanics, plumbers, doctors, nurses, engineers, electricians, landscapers, elevator installers, accountants, lawyers, air traffic controllers, pilots, architects, HVAC installers,
Sure you can find examples in every industry where few are paid far more than average or norm in that industry, but nothing like the spread you find in pure popularity based industries like entertainment be it professional sports, music, acting, YouTubers, streamers, authors, poets, etc.
More importantly the divide comes when you have something that can be infinitely reproduced at marginal or no cost (software, videos, books).
In general even the software world is "order of magnitude or so" between top performers and everyone else, but there are still outliers where an indie developer goes on to sell millions.
What's interesting about the author world is you can perpetually support yourself on advances as "mediocre but not complete failures" if you can write enough. And who knows? Maybe one day it'll hit gold and your back catalog will become valuable.
Sure you can find examples in every industry where few are paid far more than average or norm in that industry, but nothing like the spread you find in pure popularity based industries like entertainment be it professional sports, music, acting, YouTubers, streamers, authors, poets, etc.