I don't mean to go round and round and round on the same topic!
Consistent with our goal here of not just "discussing" Epicurean philosophy but also promoting and trying to assist in reigniting interest in it, this seems to be one of those issues, right up there with explaining Epicurus' view of the meaning of "pleasure," for which we need something on the front page of the forum to illuminate the issue and prevent people from getting confused by the seeming implausibility that Cosma Raimondi is describing.
I think we're making headway on that with "pleasure," and "happiness" needs to be treated similarly.
Just like with "death is nothing to us" and "For gods there are, since the knowledge of them is by clear vision."
We can help things a lot by working on a couple of sentences on happiness, so let's try to see what we can do on that. I am thinking this deserves an extended back and forth with many iterations before we can come up with something brief, then we can link to a longer discussion beyond that.