M. Salah is indeed the most important player at Liverpool. He contributed the most to Liverpool. But last season we also saw several matches played by Liverpool without Salah. And yes, the results are not much different. It's just that when Salah is around, Liverpool becomes sharper in attacking. But when Salah was injured and he was absent for several weeks,
When Mohammed Salah was absent for sometime it affected Liverpool performance a lot because he is one of there key players, actually whenever I see him performing he always reminds me of Lionel Messi when he was playing for Barcelona with his left foot very strong and funny enough Mohammed Salah is also a left foot player, so they actually have a lot in common but just that Lionel Messi is more experience and vibrant than Mohammed Salah, however the only reason Liverpool was able to navigate into performing well on the absence of Mohammed Salah was because almost all there players are very experienced.
Mohammed Salah is one of the most important player in the Liverpool team and as their highest goal getter, being absent won't affect only the performance of the team it will also reduce their number of goals because he is always scoring goals in almost all the Liverpool games or he will be part of the goal scored. Sarah's left foot is good as he uses it to make some incredible dribbles but it can't be compared to that of Messi cause Messi's left foot is magical as it has been used to score some unbelievable goals which I think only him can an answer to how he does those magic.
Liverpool managed to keep up to good performance when Mohammad Salah was injured because they have got a team that is not built solely on the shoulders of Salah but that doesn't mean he's not the best player in the Liverpool team.