"supremely ornamental" is kind of an oxymoron.
one implication of Frost's poem being, that our teasing artifices are merely the frills & ornaments echoing a more general (& divine) manifestation (or hide n'seek).
& so, furthermore, "telling it slant" is more natural (true-to-life) than some well-meaning deliberate patronizing obvious "realism" (meant for the "nonintellectuals" amongst us).
& yet... & yet... our motive for these evasions moves inexorably toward its denouement, the unfolding of that implicated truth.
it's a both/and sort of tensile harmony.