The problem is: native speakers have a very warped idea about what's "difficult" about their own language. Ask English speakers about what's difficult about it

The problem is: native speakers have a very warped idea about what's "difficult" about their own language. Ask English speakers about what's difficult about it, and half of the time they start talking about spelling, because that's what they feel difficult. Nobody says "When I see 'place' or 'book' how do I know if it's a noun or a verb?" because that's just blindingly obvious to a native speaker.