In an ideal world. Yes!
The problem is that Dortmund lets their own 17 year old talents be regular starters at the cost of their end product, their loanies won't get the same trust and must deliver (like Hakimi) to get the minutes. Reinier is wasting a very important year of development there. They are fine with letting Bayern be #1 and just getting out of their group in the CL every year. They are pretty much the perfect stepping stone club for the elite talents they own as long as the end top 4 in the league every year. The Haalands, Sanchos, Reynas and Bellinghams etc. are thrown in to the pool at the deep end and given time to learn how to swim. We're not doing that because we demand titles and immediate results along the way, and that does not mix with giving youngster plenty of minutes without loads of pressure on their shoulders. Unless we can live with not fielding our best eleven against top opposition regularly to give youngsters valuable education, we won't have the same drag on the top talents. Not every supertalent will hit the ground running like Haaland and Sancho did, and we wouldn't give them enough time to get there the fastest way if they don't. The elite talents needs to know their talent is being nurtured the best possible way. As an example; do you think Greenwood would develop faster if we gave him 60-90 minutes every game despite him not delivering the goods? It not just us though. Would Foden be even better than he is now if Pep didn't give every title a shot and played him more earlier? Delap? I think so. To be a titlepushing club and a great place for youngsters to grow at the same time is a very hard combo. I would love for us to give the youngster more minutes, but that would give us less points in this league, and U23 is not the place for the elite talents to grow. I hope we get better at finding attractive loan destinations for our best youngsters...
If I was Haaland I would easily take the the same route, knowing that my talent gets the best possible treatment and that my dream destination and career is even more realistic when I am patient and take it one step at the time.