Just imagine that Dortmund doesn't have the selling mentality and see what their squad and their legendary squad will look lik, let's just try to mention
- Lewandoski
- Aubameyang
- Sancho
- Haaland
- Bellingham
I know I have omitted many but the fact is that Dortmund doesn't want to build for long. They are simply doing what they are used to doing and what they think gives them results.
Borussia Dortmund would have been a great team if they hadn't sold these players. But when Real Madrid or Bayern Munich make the players a transfer offer, the players are affected. If I was a Borussia Dortmund player, I would immediately accept a transfer offer from Bayern Munich or Real Madrid, because playing for bigger teams means winning more trophies and having a better career. Lewandoski won many trophies at Bayern Munich. Haaland won both the English Premier League and the Champions League in his first year at Manchester City. Had Haaland stayed at Borussia Dortmund, maybe he would never have won the Champions League.
Dortmund can produce talented players. But naturally talented players will not want to stay with Dortmund. Because this team has no hope of winning the title. They do not form a squad fit to win the title. Lewandowski won several Bundesliga titles with Bayern Munich, La Liga with Barcelona. Haaland won the Champions League and Premier League titles in his first season with Manchester City. Had they stayed with Dortmund, they would never have won so many titles. This is why Dortmund cannot keep talented players with their squad even if they want to. So almost every season they sell the best player in the squad for a smart price. They are financially very profitable.
Dortmund doesn't really want to win a title either in the Bundesliga or in the Champions League because Dortmund's goal is only to train its talented players so they can sell at high prices to elite European clubs. If Dortmund wants to win the title, it might happen because Dortmund has talented players in it, so if they are able to compete strongly and pursue their ambition to win the title, Dortmund will definitely be Bayern Munich's strongest rival.
Unfortunately, Dortmund only thinks about business without thinking about the careers of its players so they can win trophies, that's why many Dortmund players don't want to stay at Dortmund for long because Every player definitely wants the title of champion at the club he plays.