Well, that's the entire population. Half of those are above the age. Only around 15% of those are at the game where their football career starts. More than of them are females, so 7% at best qualify as male in the right age. If any of those people are interested in a sport it would be Badminton more than football.
Consider the quality of facilities, development programs, managers, league competitivity, and youth sports center and it is not 256 million, more like 1 million, barely. No country in the world won titles thanks to its population.
that is a valid point from you. But those in the population rank, have a lot better rank than Indonesia.
7% of those 256 millions population is still a large number. Eventough we have much better players in Badminton (and rank), but Football still is the main sport of choice for Indonesia.
I was looking only at the number of populations only, but in the next post, I would discuss more of why we can't really thrive eventough we have large populations.