Football isn’t as simple as that. Whatever we say about Liverpool, Mane, Salah and Frimino were not just class players, they were mentally tough. They all played as a team and did so much work off the ball. To play week in week out, never getting injured , scoring so many goals and most importantly living up to the expectation of playing for a big club is not something that can easily be replaced.
Nunez, Diaz and Jota may all look great on paper, but they will never ever repeat the consistency of a peak Mane, Salah and Frimino. (Btw Having Salah at the club running down his final year is not healthy for the Club or player).