An empty tomb or the empty tomb? As far as I know the empty tomb would be meaningless in any case as the standalone idea you've tried to portray it as. Unfortunately for you there are the other resurrection accounts.
But don't forget first that the earliest gospel, Mark, originally ended with nothing more than the empty tomb. So anything about visions, eye witnesses etc is likely embellishment to fit an agenda.
But even if you accept the basic narrative, it can easily be explained in a completely non supernatural manner through any combination of:
Jesus not being actually dead (which isn't implausible at all particularly given the much poorer understanding of physiology in those days)
Mistaken recollection (again not an unreasonable assumption). Ask a bunch of witnesses to a car crash and you'll straight away get many differing accounts
Exaggeration and embellishment (just think of recent historical events that we have really good accounts of and how rapidly stories arise that are embellishments what happened or completely fabricated, whether due to mistaken recollection or deliberate misrepresentation for a purpose).
A virgin birth? Well nobody apart from God had the technology in those days....Nowadays it is different.
If a woman has a baby and her husband knows he hasn't had intercourse with her I don't think virgin birth is likely to be the cause. I think something rather more naturalistic is going to be the reason!
I think the truth of the matter is that any merely historical fact loses it's impact with time.
So had the resurrection merely been an historical event it's value in perpetuating faith would have tailed off . However Christians have there own experience of the resurrected Jesus and it is that which makes the account of the empty tomb resonate.
Somebody living within and committed to an arid philosophical materialism isn't necessarily going to appreciate either aspect of the resurrection unless the reinforced titanium doors are prized apart.
I agree that the 'myth' can become more resonant in terms of its longevity than the actual factual truth of what actually happened. And much more so when aligned with a combination of:
1. Embedding the myth in a religious belief with its own customs, traditions, mechanisms for passing belief in the myth from one generation to another.
2. Imbuing belief in the myth as an element of cultural identity (with links to 1) and
3. That the myth is based on events that happened at a time when the ability to collect verified and verifiable evidence for what actually happened was much poorer than today and
4. That the historical events which gave rise to the myth happened at a time when the distinctions between historical reality and myth/legend were culturally blurred.
The events that lead to christian belief fit with all of these.
However none of this alters that fact that the all of the claims within the gospels can be easily explained away without resort to the supernatural.
And the notion that for a christian a personal belief in the resurrection, even a belief in the actual veracity of the resurrection is deeply, deeply important to that person doesn't mean it actually happened.