This is not the kind of play that brandishes a singular sharp point; it is the kind that swaddles you in innumerable impressions. Like Butterworth’s previous Broadway outings — the mythopoetic “Jerusalem” in 2011, the brawny Hugh Jackman vehicle “The River” in 2014 and especially the Irish fable “The Ferryman” in 2018 — “The Hills of California” is a yarn, not a lesson; a tale, not a tract. It resists interpretation, possibly as a way of resisting criticism, which, despite its flaws, it clearly does with great success.