Maybe Dortmund don't have a squad as strong as Bayern Munich but they are still able to maintain their level in the Bundesliga. I really like their mentality for years. They have been making a lot of profit in talented player sales and they still manage to stand still in the league despite losing strength.
For example they haven't filled Bellingham's space with a similar talent. His contribution to the team was really significant you know. However they still don't make it a problem for themselves. We are watching them only two points away from the leader and having a winning streak of four games now.
They play as a team and don't focus on just one player, which is what allows them to survive after they sold many of their star players. Actually it must be admitted that they are very good at managing the game, but some of us including myself think that they cannot maximize the players they create. Selling star players for profit is not wrong, but it's a pity if they don't try to use it to win a title and not just get finncial benefits. That's what we often discuss from Borussia Dortmund. If you say it's a mistake, it's not a mistake, but if you say it's the right thing, I don't think it's the right thing either.