EB1c is trivial because of the manager route but with many WITCH companies exploiting it, they might change things in the future.
Eb1a is the tough category they are talking about.
It's not that simple. You need to have been a manager outside of the US for 1 year, apply and get approved for L1C visa, enter the country on that and then once in the US apply under EB1C. All the time maintaining legal status.
It's trivial compared to waiting 15 years for your EB-2 to be processed.