That has nothing to do with his own DC and the fact it needs time to get to the point where it causes an explosion makes it too slow to matter in a standard OBD match and it can only work if the planet itself does not have a counter force of it's own interfering in that. If this was set in the Hyperbolic Time Chamber for example, one of the most common neutral setting the OBD uses, it would essentially do nothing.
It only does that when the planet has nothing to counter it, and takes too long to happen, and reflects nothing of it's own DC which only caps out at Country level.
Citation that a world which can have a moon come closer or grow bigger near it without any hi-jinks involving the laws of physics as our world does makes it the same as ours?
Lol so you can demand us to treat FT as exactly the same as our Earth and Moon but when we tell you to show us proof of why it is despite never showing key things such as a moon being pulled into it's gravity, or having it be too big to not start effecting the current Earth it is in from the mass of another planet, it's "Asking for too much".
Sorry bucko but that's not how it is going to fly. You're the one made the claim it is the same as our Earth and Moon and now you need to prove that it is. Hell from what I see in the scans the Moon even before it grew or came closer already looked like it was closer to the surface of the planet anyway, making it all the more questionable it is the same as our own Moon and Earth.