I think Benzema was not in a good condition in that match, but somehow ancelotti gambled by playing him from the early minutes of the game, doesn't Madrid still have some other players who are attacking?
The 1-0 victory against Madrid is of course not safe enough to guarantee PSG qualify, and of course Pochettino must be able to rest his main players to have a good performance in the second leg later, and so far PSG position is no longer possible to be overtaken by other teams in the league and this could be an opportunity for Pochettino to field the reserve squad rather than continue to force the stamina of PSG main players for play.
Actually, if we look at the news circulating there, Benzema's condition was not fully fit at that time and indeed I feel that Ancelotti was really desperate when he included him in the team which if there was a mistake in the match it would only aggravate Benzema and cause him to be out longer.
But indeed on the other hand they also don't have a chance because when he's not there Madrid are confused about scoring goals.
For Ligue 1 I don't think they need to worry and I quite agree with what you said it's better for them to rest some players and let the players who are on the bench be given more chances in the game in Ligue 1 because I think the players who are on the bench no less good like the core players because there are some great players there
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