Earlier quoted context omitted.
Useful to what end? So that people can easily label an idea such that tribal followers can quickly decide if they are on board? I can't think of great applications, only negative outcomes from such a simplified labeling of people and ideas.
As Karunamon said in a sibling comment, labels facilitate reasoning. Yes, labels have their inherent risks, especially such vague labels as left and right (as applied to politics). But we live in an age of political parties. It seems we can't do representative democracy without them, for better or worse: And given that, we need a language to talk about parties' politics in broad terms. And then we inevitably come up…
this is the claim, what is your supporting reasoning?
>we need a language to talk about parties' politics in broad terms
Why? Why should we strive to generalize something so inherently complex and impactful as policy.
>once fronts harden and the tribal impulse sets in
I'm not understanding how simplistic labels can contribute to anything other than this outcome.