Both Real Madrid and Chelsea seem to have no serious intention to sign Benzema. There is no big advantage to have him in the squad. Benzema even failed to play well in Saudi, how can expect him to play well in Europe? Real Madrid focuses to sign young strikers, their targets are Mbappe and Osimhen. Meanwhile Chelsea already have Nicolas Jackson. Chelsea also prefers to sign young strikers.
The era of Benzema was over, he is no longer in the prime age. Why he must return to Europe now?

It's a same question like people who're keep asking both Messi and Ronaldo to play at the competitive league.

People forget if their idols are aging, even though they can still play very well in small league, but expecting them to play very well in top league is ridiculous. When people hit 35 years old, they're only thinking how to have a better life for his family and how to make money without need to work.
They're only playing football as a hobby or fun instead make a history.