Thats not the definition of strength. The strength in depth is what matters when it comes to the strength of the league and the Brazilian clubs produce so many quality footballers that the depth of the league is superior to countries like Belgium, Turkey and the Dutch league. Maybe the Russian league is stronger I agree with that. Portugal probably too, but the Brazilian league is right up there among the best leagues.
A good point, but those players they produce are leaving that league and there are no proper replacements for them because their reach for transfers is limitted to only the south american continent simply because no european player ships over to earn his money in a south american league.
And the leftovers are washed up 35-45 yr old former stars with stamina issues heading for retirement and thousands of players noone is interested in.
Turkey, Russia, Netherlands etc are not facing this problem, or at least not in this extend, because they can constantly attract players from all continents, including south america thus having a much larger pool for replacements whenever they need it.
Also the dutch Eredivise isnt any worse than the brazilian league when it comes to talents and youth developement. Arguably even better. . Almost every big- and small european club has several former Eredivise players.