Dortmund football club is just following their pattern of business and that is the way that they profit in the sports business. You cannot tell them to abandon their method. In the German Bundesliga, we can attest that Bayern Munich has dominated all the trophies for more than a decade. So grooming of young players and selling them at exorbitant prices is the way that Dortmund will prosper and make their money. That was exactly what Wenger was doing in England with Arsenal because they were unable to contents with average players he needed to groom them sell them and make money for the club.
Anyone who is here will know how the Dortmund club has been in business for a long time, making profit from selling their best players, which until now we admit that Dortmund will not think too much about a title that has never been obtained before, and most likely even have a goal of getting the UCL trophy. Dortmund list of goal will be on the list of only getting new, young player after training them to be able to develop talent so that they are more reliable and then selling them to big clubs at very high prices.
Since knowing the background of Dortmund which is famous for its business when last season it failed to win the Bundesliga title I would not be surprised because this is one of dortmund goals not to chase the title too much and I am just guessing that at the start of this season Dortmund looks a little worse than last season but Let's see, in the middle of season, surprisingly, this club will improve the quality of its performance and there will be names of new players who are very talented and will be linked to big clubs so that when the transfer market open, many club will bid high amount.