Lucretius is a good, easily verifiable example of a writer, who uses an invocation of a pagan god for literary and conventional reasons, without himself adhering to pagan religion. It thereby also defeats attempts to conclude, that a Hermetic magus, because he uses 'pagan idolatry' (see catnip & garlic) in a spell or book, would have to adhere to a specific religion.
I addressed that already in https://forum.atlas-games.com/t/the-break-room/102/1 . There is no use in speculating about author's intentions, once these are written out clearly.
In ArM5 Hermetic magic is - see HoH:TL p.5 - based on the traditions of the Cult of Mercury, and no mention of Hermeticism is made in this context.
Cheers