I think they also need a central midfielder to replace Modric. Although Modric still looks very agile, Anceloti needs updating. Benzema is still good but having a potential replacement is not wrong I think it will be profitable to start now. The senior madrid players on average may effectively play 3 years again. Maybe your thoughts are the same as mine, being afraid to start with young players. Madrid will fail in the transition period.
Plus, Real Madrid have already released attacking midfield, Isco this season and maybe it's Luka Modric's turn next season because if I'm not mistaken his contract will expire next June, so Madrid must be prepared to find a replacement, so far only one midfielder Aurelien Tchouameni has been brought in from Monaco. But I still haven't see madrid activity in the transfer market this season, maybe madrid will hold back from sign new players? Only see Rudiger and Tchouameni since a while ago and no update