I don't believe in that statement, if Real Madrid want to be even better next season then they have to bring in more players because this season they were left behind by some of their main players and even now there are many old players at Real Madrid whose quality has decreased.
The position of attacker and defender is Real Madrid's weak point next season and if the current transfer market does not buy the players needed in these positions, then Real Madrid's strength will not be much different from the previous season. For the midfield position they have Bellingham as a new force that can help Real Madrid and I think that position is safe for them next season.
After being left by Benzema, Real Madrid have not found a suitable replacement, now there are rumors with several players like Kane or Mbappe, I'm sure one of them will be brought in, Real Madrid's failure in the UCL and La Liga last season certainly made them will improve more to be able to appear stronger in the next season.
As for the replacement for Benzema there is no news on which player Real Madrid will buy, but some news circulating in the media is that Kylian Mbappe is a priority that Real Madrid is trying to approach. Learn from last season and Real Madrid must really maximize the quality of the players they want to bring in because if you rely on existing players it will be difficult to compete in any competition next season.