Yes how outlined how it it was possible. He is still sceptical and believes it has a low chance of success. And he knows that if it happens it will most likely take longer.

But the point that matters here is that even if only 0.00001% of this goal is achieved, its fantastic.

So when we evaluate their plan we should evaluate it as 100% success or failure. We should evaluate the chance that they are 0.00001% successful.

And we can still be sceptical of that 0.00001%. Since doing that is hard as fuck and will need not just SpaceX but many others as well.

But what SpaceX is doing, is for the first time making it possible to seriously consider that 0.00001%.