Yes, of course, it has some vocals. They're relevant though, heard in numerous bar scenes. But the score gets nearly half of the album. And it's the better half naturally. Westerns seem tricky to score - at least in some unorthodox way.
Audiences have expectations coming in.
They're used to expansive themes, to Copland, Bernstein, Broughton, Moross. It's probably pretty hard to do things differently. It helped that Stephen Frears made more than a western. It's set in the west, it's got cattle, plus it's got more. Standard western stuff.