I guess you are wrong because you won't know having money is more important than a better place on the table for the managers.
Obviously, Dortmund prefers to earn more money from transferring players to other teams than using the players to have a better situation. Otherwise, the Dortmund we saw could easily win the Bundesliga title if they didn't sell Haaland before.
And even though there is no Haaland, Dortmund can still compete with the top big teams in the Bundesliga like Bayern Munich, which means that Dortmund really have the ability to train their players to be better and they almost won the Bundesliga title. It's just that Dortmund had a draw in their last match so they had to continue to die to become champions, but for next season I'm sure Dortmund will again make better competition from the start of the season to the end of the season.