Sean, yes, this is what Callimachus is aiming at. Aitia 20ff:
“. . . βρονταν ουκ εμον, αλλα Διος”
και γαρ οτε πρωτιστον εμοις επι δελτον εθηκσ
γουνασιν Απολλων ειπεν ο μοι Λυκιος
. . . ] αοιδε το μεν θυος οττι παχιστον
θρεψαι], την Μουσαν δ’ωγαθε λεπταλεην.
“Thundering isn’t my job – it’s Zeus’ job.”
And when I first placed my tablet on my knees, Apollo, the Lycian Apollo, said to me
" . . . poet, raise the sacrificial animal as fat as possible,
but the Muse as slender as possible."
The allusiveness in which Callimachus couches his programmatic statement here would be entirely consistent with Epigram 1, if that poem is in fact an exhortation to eschew grandiose poetry.
Vergil echoes Callimachus’ language and poetic ideology in Eclogue 6, 3-5:
Cum canerem reges et proelia, Cynthius aurem
vellit, et admonuit: “Pastorem, Tityre, pinguis
pascere oportet ovis, deductum dicere carmen.”
When I tried to sing of kings and battles, Cynthian Apollo tweaked my ear and admonished me: “A shepherd, Tityrus, should graze fat sheep but recite a stripped-down song.”
Similar Callimachean ideology appears in Roman elegy: Catullus and Propertius, especially (and Ovid parodies it in Amores 1.1., the programmatic elegy that stands at the head of his book.). Ultimately, however, Vergil didn’t adhere to this advice. the Aeneid is the exact opposite of the Callimachean short poem Apollo told him to write.
The only Hellenistic poetry I have ever really engaged with is Theocritus which seems less erudite.
Theocritus implements the Callimachean/Hellenistic program of shorter poems crafted with consummate artistry and musicality, studded with mythological allusion, ecphrases, etc., and the Doric and pastoral setting of some of them deliberately contrasts with epic/Ionic grandiosity. You don’t think the shepherds and goatherds, with their exquisite amoebeic couplets, exchanging beautifully crafted artifacts, reflect the reality of life in rural Sicily, do you?
Theocritus is really a very erudite poet, a poet’s poet.