I think perhaps, if you're going to post Japanese language links and then act like a prat with people then it might pay to understand the content yourself.
My Japanese is conversational at best, but I was questioning whether it was saying what he claims, but went with the reading that was more favourable to you.
In which case:
50% of the total playerbase are casual and dont touch high end content at all.
50% have some kind of engagement with high end content but this includes very casual engagement, so those having a brief dabble or their FC helping them get a mount drop.
If only 30% are clearing high end content - which the article specifies, this puts the playerbase who are actively engaged with high end content quite low because they are not all high end raiders.