Enterprise Architecture is not difficult and abstract!
It is a specialised discipline, and good practitioners are experts at a huge variety of skills. So if difficult means taking the time and effort to learn how to be an enterprise architect, then EA is difficult. The best enterprise architects usually have a minimum of 10 years experience.
And to a non-architect, EA might therefore seem abstract.
The difficulty in becoming an architect should be hidden from those who work with enterprise architects. Part of the skill in being an enterprise architect is the ability to make architecting appear straightforward, effective and worthwhile.