When saving his species and the life of the entire universe became amoral, he will guarantee that saving Shakuras is not a temporary victory.
The ability to withstand sacrifice for a protoss exceeds that of a human plus we return to the false dilemma will not leave Sahkura. our summary about korhal position is this:
"Artanis: Now that I have managed to obtain a ship to leave Aiur, I can continue with my plan to recover the artifact, Zeratul’s last wish, the only one who understood this fight because he spent several years studying the conflict, and the last Hope to avoid the universal extinction, for which many protoss were sacrificed to know this. Recovering it will be easy because our friend Raynor has it, I can do it quickly and direct me to Shakura before some of Amon’s forces arrive and I prepare a defense.
Artanis: This moment is ideal, the SoA, despite being powerful, does not have enough solarium for its artificial sun, to activate all its war systems, and doing so now that it is in a fixed position will prevent any problem before any event generates its loss, since it is an object that can be stolen even by the internal divisions of the terrans they are a conflictive race, or even Amon as a xelnaga can be aware of the importance of the artifact.
Artanis: Oh no Korhal is being attacked and the terran are appealing to each other, I hope this does not delay us.
Artanis: platform will eliminate its capital, we will help our allies so that they can give us the artifact
Artanis: oh they did not steal the artifact and the psychic powers of the hybrids have disabled any defense, they will be massacred, we will fight for them and recover the artifact, as I suspected the artifact could disappear and with it the hope of winning this war not only ours but also of lifetime.
Artanis: we have recovered the artifact just in time, hopefully it has not delayed too much we must head to Shakuras
Artanis: but what is that? I was late, but how did Shakuras fall so soon were we strongly defended? his instantaneous travel the warp gates xelnaga made Amon overtake me to reach Sakuras easily even if I had gone straight. I also took the shadow guard by surprise they did not expect an attack from this, nor did he imagine that the zerg forces would be bigger than the first invasion of shakuras. to be hidden behind the portal so they spent their effort in a fight that they will not win. luckily we still maintain a quadrant of Telematros, it only remains to evacuate,
Artanis: sakuras was lost Amon is a threat not only physical but an invisible almost supernatural force that scabs the will of my people against which there is no way to fight and will make us fight each other but we still have the artifact before it is lose. It will allow us to find the xelnaga that will be able to fight against forces that exceed our capacity, this perhaps is the hope of which the vision of Zertaul spoke "
While your interpretation of all this is
Artanis: Come on korhal, the artifact is more important than the Nerazim, just as the Nerazim stand alone and if not, it will sacrifice itself for the common good.
There is a perfect example to understand what we have here
one will end in fire
A mother ship tries to rescue another but just as it tries to rescue its ship, it presents a failure and both die, the loss of artifact is that failure, the intention to save the crew of a ship is useless if it condemns both crews.
Is that you think that fighting Amon is an option, it is not, we are talking about universal annihilation this is not a military objective it is lifelong survival,
In the dark vision Amon corners all the protoss and kills them together with every zerg that was not a hybrid that is the vision of zeratul
such an example of the motehrship saving the mother ship is only a temporary consolation when there is a small crack in his crystal, if they all felt well towed by the troo ship but if he had been aware that it would happen, he would have preferred to die than take both crews. that small flaw that seems insignificant was the difference between saving everyone and nothing, that was the artifact.