It was not that the Celestials cared all that much about their universe, but because there were still some Celestial members in that universe who had yet to be born.
As long as those unborn Celestials were still alive, the Celestials still had hope. At the very least, there were still Seeds that could continue on.
And if they revealed the coordinates of their own universe, those unborn Celestials would definitely die, and they might not survive either. After all, they had all witnessed Thanos's decisiveness in killing before, and they did not believe that telling him everything would let them live.
From that brief clash alone, the Celestials could tell that this universe's Thanos was somewhat different from the Thanos of their original universe. This universe's Thanos was even more decisive in killing, as if he had once suffered some kind of shock.
Thus, the Celestials could only stake everything on breaking out, and the final result went without saying. Only Exitar had escaped. The rest of the Celestials had been wiped out.
That was also why no one had responded when the Executioner contacted the Celestials earlier. They had already fallen into that kind of life-and-death crisis. How could they have had the time to look at incoming messages?
And the reason Exitar had been the one to escape was, in truth, merely luck. Exitar's strength was clearly inferior to Arishem the Judge's, but Arishem the Judge was already dead as well, his corpse having become Thanos's spoils of war.
Only Exitar had shrunk his body and hidden on this desolate planet, which was why he appeared to have evaded Thanos's pursuit. Even so, Exitar still did not dare show himself, because he did not know whether Thanos had noticed him.
As a result, before Exitar could even