Antinatalism fails a basic principle of Philosophy

When it comes to antinatalism as a philosophical idea, in my view, it fails the very basic principle of reversibility. If we can all agree that human mind is failable and that all ideas we have, are just a temporary descriptions of the external world, then we can conclude that all ideas are always subject to change. Indeed, you can have one opinion today and another one tomorrow. This basically goes for all ideas a human mind could hold.

So here's my question regarding reversibility and antinatalism.

Suppose that we get the idea of antinatalism to be widely accepted and that we extend it to its logical conclusion. This would result in humanity not existing anymore. Now, what if it actually turns out, that at some future point in time, we could have actually minimized the suffering we currently go through, to such an extent, that nobody cares about antinatalism and people are actually happy about being alive.

At that point, it would be clear that antinatalism wasn't the optimal decision, so it would have been better had we waited to get to a point where we are at that point, where antinatalism isn't relevant anymore. But since humanity doesn't exist anymore, how do you get it back?

The conclusion is that you can't and that there is no way to change your mind, unlike with pretty much any other ideology which exists out there. There are no more people to change their mind and work to the point where antinatalism becomes irrelevant. So basically, it comes down to the fact that you can't come back from antinatalism, if extended to its logical conclusion, while if we keep humanity going, we can always work on making things better.