If you want to impress people by pulling out big words, at least pull them out in appropriate situations.
To get completely exhausted, my cycles would look really, really strange. Or would have to include alcohol on a daily basis.
Never mind that I never have gotten a really good explanation why I should become a consistent early riser. Most people just cite external social effects that are mostly true if you stay up late, too. Or just don't apply at all (wife, company culture, deadlines, meetings etc.). Quite the contrary, if you're in Europe and have to communicate with people in the US, working late has advantages of its own.
So generally I'm not losing any sleep about not being an early riser.
It's possible to have insomnia while still being someone who needs a sleeping pattern than a large part of the business world adheres to.