I consider that sloppy storytelling. The fact that the message is so vague and hidden means different people will come to different interpretations. You can find meaning in virtually everything if you want to but it doesn't mean it was meant to be there. The point you and others are missing is that kind of storytelling would not hold it's own in an educational setting because it doesn't "teach" you anything. In the case of MGS Kojima is the teacher, you are the student and MGS is the text book. It's meant to teach the player and so being vague or interpretational doesn't suffice. Imagine had Neitzche written short stories with interpretive characters his work would then be almost worthless because philosophy is a very percise and descreptive field where the writer must express himself extremely precisely through the use of words.
Kojima is IMO one of the greatest creative thinkers of the past century and though he is underrated today in the future when his political and social predictions presented in MGS come true people will take notice and remember him.
I'm sorry but that is the most ridiculous line I have read in quite awhile.
Textbooks
tell you what to think. Art
asks you to think. That's not sloppy at all, that's the sign of true art.
In 100 years, few will remember who Kojima is but I guarantee you people will still be watching Apocolypse Now and reading Heart of Darkness, despite the fact that they ask you to think instead of telling you how to think, which is apparently a boon of storytelling in your crazy little world.