The way you frame it is as if your desired behaviors apply to all Epicureans, and that's not true.
I guess the question of should each modern Epicurean engage in these "experiments in piety" is a separate question, that can be asked separately by different individuals or groups.
But the point I'm making is a different one: that the ideas attributed to Epicurus in On Piety (that true, material, natural piety has psycho-somatic, observable repercussions) has a solid foundation of empirical evidence. That certain ethical or pious practices do seem to affect the health of mind and body. And modern Epicureans should be happy to accept that vindication with curiosity, and referring it back to the sources. We should be happy to say: "Look! Epicurus was on to something here!"
Also, chanting happens in both Catholic rosaries and Buddhist and Hindu mantras, so this is not a vindication of a particular culture or chant. These studies vindicate a NATURAL process, not the cultures in case.