So I’m technically agreeing with you that the Null can be anything and everything, but before that, what exactly is the Null canonically in Murder Drones, because that’s what’s important. It’s said both in the series and outside of it that the Null is a singularity, and no, a singularity isn’t necessarily a black hole. A singularity, by definition, is a point in space-time where the laws of physics no longer apply. In reality, the definition of a singularity is extremely vague; it’s an anomaly in our dimension that can take several forms, such as the initial conditions of the Big Bang, gravitational anomalies, or quantum instabilities. It’s something we cannot understand and that surpasses us for the moment.
So the Null is a singularity, which means the Null is an anomaly that can take different forms. We can agree on that again. And the singularity that destroyed Earth is, for me, not a black hole but a kind of rift that assimilated the planet, which leads to the dimension of the Solver, because it’s clearly established that the Solver doesn’t belong to the world of Murder Drones, and the rift is the means of assimilation for the Absolute Solver. That’s why tentacles come out of the rifts, it’s the true form of the Solver trying to grab everything around it in order to assimilate it. However, as we saw in episode 6, the Null can also be a black hole, since the Null can also be created to absorb matter. But the singularity that destroyed Earth still remains a singularity, and since a singularity can also take the form of a black hole, calculating this singularity as if it were a black hole makes sense, because that means if Cyn can create a singularity of that size, then she can also create a black hole-type singularity of that size as well, and therefore create a black hole of the size shown in the calculation. Especially since we know that Cyn destroyed Proxima Centauri, it’s shown on the computer in episode 6 of Murder Drones.