In fact, Benzema single-handedly caused Madrid to knock out PSG last week. Making a hat-trick against PSG in 20 minutes shows how good you are. If they hadn't had Benzema, PSG would have just moved on to the next round.
However, Benzema cannot do it alone. Without assists from 2 creative midfielders of Real Madrid (Kross and Modric) and wingers (Vinicius and Asensio), Benzema will be difficult to score. I think all players of Real Madrid have contributed to winning the match against PSG. Even Benzema can make a hattrick, Real Madrid will be defeated if they have weak defenders. So, we also need to appreciate how good the performance of Real Madrid defense line is, nowadays.
All players do contribute according to their respective portions it's just that no matter how good the defenders and midfielders are without scoring goals they will never be highlighted in this case Benzema gets it not all strikers can make a hat trick especially in a super big match like this only great players can do it. Benzema has always been known as a savior in crucial matches that's one of the reasons he was never sold.