I was listening to a security podcast and someone of considerable industry experience said (of something they just did):
“That’s a rookie mistake”.
No, it’s not.
It’s just a “mistake”.
To say it’s a “rookie” mistake is being disingenuous to rookies, particularly when the experienced person is still making that same mistake.
So, by virtual of a fact it is an easy mistake for someone of experience to make, that makes it just a plain old “easy” mistake.