Not Only But Also

Regarding the (Not only A but also B) structure, I know that we can omit “also”. I would like to know can we omit the word “only”.? I would like to know whether the following sentence is (Not Only … But Also) sentence.

If we turn our gaze to the arguments about justice — not among philosophers but among ordinary people— we find a more complicated picture.

Which meaning is correct? (1) Not only among philosophers, but also among ordinary people (2) Among ordinary people, but not among philosophers

Solution 1:

(2) is the meaning of the highlighted sentence.

Not among philosophers has the opposite meaning to not only among philosophers but...