Dortmund need money and making money by selling players is their main business. If these 5 players mentioned by you were in Dortmund's squad at the same time, then Dortmund could have dominated Europe. They were also champions of the Bundesliga. Even for the Champions League title, there were hot favourites. But Dortmund have to make money. They will not keep any player in their squad for long. But the Dortmund management is very talented. They can spot young talent. At the same time these talented players can be developed into experienced ones. If they didn't get it right, maybe we wouldn't have great players like Haaland, Lewa and Bellingham.
we have the same thoughts and I have previously said this regarding some of these players, but we cannot go against Dortmund decision to always prioritize selling players over the titles they have to win. If we look at Dortmund history, this team has always had talented players and has always been successful in creating new talents for them to sell to all european teams.
and if we want to count how many Dortmund players have been spread across European teams, its definitely a lot and I think its all just about the investors who fund the team and then get large amounts of that money.
and I also thought that in fact Dortmund is trying to prioritize titles in several competitions, of course the players who will be sold have very high value but for some reason Dortmund management does not try this method to get more money when player manages to score and bring victory in the competition like UCL.
until now, Dortmund fans can only hope that Dortmund will immediately end this way of working and occasionally win prestigious title.