The dominance of Bayern Munich in the German Bundesliga in fact does not make the Germany League less quality. The proof, the Bundesliga is still the third largest contributor to the player so at the 2018 World Cup.
Of course the defending champion, Munich, became the largest contributor to the clubs from this League with a total of 11 players. While Borussia Dortmund became the second most abundant team that accounted for 7 players to the 2018 World Cup.