I agree with your opinion that in this match the performance of the front line players is the key. Real Madrid really needs variety in its attacks, especially if players like Rodrygo and Jude Bellingham have difficulty scoring goals. Adding a center forward could be a smart strategy.
So, adding a center forward can be a good strategy in situations where the front line is having difficulty scoring goals, and this can be the difference in the match.
However, the question is who is the right striker to buy in the middle of this season?
Ancelotti didn't have many options in that match and losing Vinicius also reduced Real Madrid's attack power when they wanted to put pressure on Atletico Madrid's defense. Joselu was not able to do much in that match because Atletico Madrid formed a good defense, so it was difficult for him to find space to score goals. I still hope that Mbappe will become a Real Madrid sticker and although PSG are still reluctant to let him go because one of the players Real Madrid needs in front is a typical player like Mbappe.
This derby shows Diego Simeone's ability to be able to finish the match for their victory and also becomes a note for Ancelotti when facing other clubs that are more balanced. When several front players are not available, Ancelotti must find the right strategy to avoid losing in the next match.