[tptacek]

No, that doesn't make sense. The errors that trip seasoned pros up are very likely to trip rookies up as well. Words mean things; rookie mistakes the mistakes that don't trip up the pros.

[ikiris]

you're assuming the "pros" hired people with experience in the domain and retained them, and didn't let rookies do said mistakes.

[tptacek]

Ah, the venerable "no true professional" argument. A sufficiently optimizing professional would never make these mistakes, it's true!