Yes, but humans will almost never actually focus 100% on one task. Almost everyone needs some hobby/creative expression to keep up their mental health. Humans do these tasks to be able to survive, not because they can’t think of anything else. The complexity of human society is unrivalled by any other social species we know of.
Each ant (in the more modern species at least) works for the ability of the queen(s) to reproduce. This is governed by instinct, no ant will sit down and think about its contribution to ant society. This also makes a colony less of a society and more like an organism. The ants are acting like cells of a body, working only towards the goal of survival and reproduction of the whole while never achieving the latter for themselves.
A human society on the other hand is the interplay of social organisms that choose to cooperate with certain goals in mind and a certain degree of interdependence. The individuals will sometimes sacrifice themselves for society but most will keep their own reproduction (= family) as their main priority. There are of course a lot of parallels and similarities , however the human capacity for individual agency and choice of cooperation is the difference that makes human society so unique.