“It is safer for your account.”
I agree with Abbie. I have NEVER chosen the “stay logged in” option for ANY site.
Call me paranoid if you like, I simply find it prudent.
As for the annoyance of logging out? Two clicks is annoying? And if you are like me, I click on any email from faa and choose to log in automatically. Rarely do I ever have to actually go to the login page.