If death is the final end. How does secular Buddhism circumvent the issue of nihlism?

Hi,

I was watching some talks by Alex O conner and he gives a good point that. If there is no afterlife in heaven for Christians. Christians knowing this may keep on practicing their religion, but there is a nihlistic tinge to it, that it didn't really matter.

This also applies to Buddhism that if there is no after life or reincarnation nor a possibility of enlightenemnt. Then doing any of this Buddhist practice is ultimatley pointless after death. Even if I suffer more or suffer less, it ultimately didn't matter once I die.

So I guess the big question is does Secular Buddhism defeat the issue of nihlism? Or do secular Buddhists in a way accept that they are Nihlists in a way.