@hassan, I remembered that you had mentioned this in an earlier post also. You had cited the example of Minchol Son of North Korea who had emphasized this very point when he was playing for Shillong Lajong.
"Son never considered playing in North Korea’s Highest Class Football League, which he describes as an “amateur" league without foreign players. “In Japan, there are many foreign players from Spain and Italy who come and play there. But in Korea, the situation is different. The league is good, but competition is limited," he says."
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"Son never considered playing in North Korea’s Highest Class Football League, which he describes as an “amateur" league without foreign players. “In Japan, there are many foreign players from Spain and Italy who come and play there. But in Korea, the situation is different. The league is good, but competition is limited," he says."
https://www.livemint.com/Leisure/lDTdX337DUYjAuknIzY3VI/Minchol-Son--Following-his-dream.html