WHY DQ isn't popular in America

Hello!Nice to meet you.
I'm a Japanese.
Well...I have a question.
Why the Dragonquest (In America it called DragonWarrior) isn't popular in America?
DragonQuest is most popular RPG in Japan (than finalfantasy).
It's wonder for me.
WHY?
Could you tell me your thinking(opinion?)about it?

Sorry,Poor English.

Way too much gameplay.  RPGs requires the player to devote time and effort into the game.. also, it requires reading.  Knowing that, how many people in the first place really enjoys reading?
Xenosaga and Final Fantasy X sold well because of their cinema like quality.  at least Final Fantasy X did, not sure about Xenosaga.
If Dragon Quest played out more like a movie: 45 hours of cinema and 5 hours of gameplay.. it would sell well.

Take Suikoden for example, the game has a great storyline, but i'll never reach the cash flow of Final Fantasy because of their lack of FMVs :/ which is depressing