I don't have the time to argue, so I'll try to make my argument concise.
1. Two minds are better than one (pun intended) and will give us better chances of copying the starfish's abilities, since they are bound to be stored in the local cluster's memory. Furthermore, there's always the chance that one team will be shot down while escaping or that something bad will happen to them so having a backup increases our chances of success.
2. It will result in better payment, since otherwise all we did was for nothing and it's like we failed the mission. I wouldn't want us to stop while we're so close to victory.
3. It will make the deaths of the people in this mission mean something, because otherwise they died for nothing.
4. It will be more fun. This mission has been very fun and thought-provoking/challenging so far and I'd like that to continue.
5. The planet was hibernating when we landed so landing at the exact same moment was not necessary. The teams were launched at the same time but covered different distances to get to the planet, one of them spent more time at the landing zone yet travelled a greater distance. So all this tells us that time does not pass at the same rate for both teams.
6. If our guns can't hurt it, then how will a bunch of low level people with no powerful equipment be able to land safely so they can pick us up? The nukes will (hopefully) be used away from us, unless they want to risk killing us. Orbital laser artillery cannot be used or we risk our implants getting fried by its EMP blast and the Sword getting targeted by the planet. And no matter what, I'm still deep inside a tunnel, so we'll at least have to RP the time it takes for Flint to get out of the tunnel, which should be at least as much as the time it takes for the shuttles to arrive, if not more. I am forced to fight it. We can't outrun the planet or the worm. And as long as that cluster remains active, it can create anti-air that will make extraction harder, since Steve said Haebi can maintain nerve connections through contact with the skin. So no matter what, we will have to clear the LZ of hostiles to make it safe for landing, so we might as well do it now.
7. I don't like OOC solutions to IC problems. OOCing problems away is counter to the spirit to the game and reduces the fun. Problems should be solved by good ideas, luck, talking/convincing/yelling at/threatening or even killing insubordinate teammates instead of reconning them out, things like that.