Thanks, I found that provocatively helpful.
Tenets were mentioned above. These need to be enumerated and examined for the case to be made.
Nihilism.
I know what you mean here, although I think this needs elaboration for the case to be made.
Since time is limited, however, I'll simply say:
I think that there is a stronger argument for antinatalism that doesn't rely on the negation of meaning in human life. So, as one tends to find with these things, there's more than one antinatalism.
I think another line I'd pursue with this argument would be to do with metaphorical procreation. I don't have time to give details here, but:
If AN is fundamentally about eliminating suffering, and if this requires the cessation of life, what do we do about those who are still alive? There is, at least, a tension here.
Do we negate their life? If so, this causes suffering, which is against one of the root principles of AN. If we don't negate their life we are implicitly encouraging the continuance of life.
I don't think I've phrased the above in an air-tight way, but perhaps you can see the direction in which I'm pointing.
As I've said elsewhere, I have strong AN sympathies, but also philosophical reservations. The above is one of them.