#and ultimately oversimplify it when rtd is clearly working through it himself. it's nuanced and v contextual

[sadcoms]

AU where Rose stayed with the Time Lord Doctor after Journey’s End and they start to argue more like they did in S1 because the Doctor is doing his “I never would” thing and Rose is now saying “but sometimes you HAVE to” which causes him to start down another Davros-inspired spiral about how he’s “turned her into a weapon” and she’s like...actually travelling across dimensions trying to fight eternal darkness brought about by a ton of genocidal aliens will do that to you regardless!

Because Rose was never for pacifism-above-all-else. The episode before Dalek Harriet Jones straight up says she’s a very violent young woman because Rose (not unreasonably) wants the Slitheen to be blown up after they murdered countless people. Same with the Nestene Consciousness - but the Doctor says he has to give it a chance, and that is what she mirrors back at him in Dalek. This is usually why the pair works, because if one doesn’t have mercy on or compassion for someone the other one usually will (eg Cassandra). That’s why Ten is even willing to give Davros a chance, though it’s exacerbated by a lot of guilt around the Time War, especially when it kicked off in-part because of what he did, and failed to do, in Genesis of the Daleks.

And that is what Davros never got - that Rose had already seen the Doctor’s soul and loved him anyway; that part of their souls are the same because they helped each other grow. And it’s the same for all of the companions this era, whether it’s Jack saying he never doubted the Doctor would kill him, or Donna seeing him murder the Racnoss and still regretting not travelling with him, or Martha (somehow) forgiving the Doctor for the year that never was and for everything he burdened her with.

Because I think what Davros and the Doctor came to see as him turning people into weapons was actually just people willingly taking on the burden he carried. Again, a lot of people sort of write Tentoo and Rose off as the dalek genocide couple, but what exactly was the alternative? Let them destroy the universe? The Doctor is a coward, any day, and that makes complete sense as a reaction to already bearing two genocides on his shoulders, but it’s also that cowardice that makes other people step up and be brave, which usually means sacrificing themselves, and the Doctor carries that too. That is why Martha gets the direct parallel to the Doctor with the Osterhagen key - both are willing to burn their planets to save the rest of the universe, and Martha already spent S3 being more like the Doctor than he was because he was so broken by grief. By Season 4, the Doctor is already so self-destructive and so self-loathing that only he, the "true" Time Lord, can be the arbiter of genocides and who can’t be. Even when it comes to Martha, or to another exact replica of himself.

(Never mind that he makes essentially the same decision the Metacrisis Doctor and Martha did again in End of Time when he sends Gallifrey back into hell, but hey, he got there in the end.)

And it’s one of the reasons why the Doctor’s so reliant on the Master. I’m not sure he would have gone to get his ‘reward’ had some of that weight of destroying Gallifrey again not been shared with another Time Lord. Ten does, ultimately, put humans on a pedestal and does his best to protect them even when they are willing to share his burden (note that Tentoo destroying the Daleks means Donna doesn't have to take on any of the burdens Rose or Martha did, so she stays the least militarised companion). He simultaneously wants that other Time Lord judgement while needing humans as another perspective.

All of this to say that, I think most people understand that Ten being with someone but especially with Rose would have stopped him going Time Lord Victorious, but they don't necessarily understand why. TLV comes from his desire to save everyone, because all the loss he's seen and has caused is too much. Not only does having Rose help soothe that, but she also specifically could have helped ground the Doctor back to where he was morally in the first two series, which is quite different from where he is by S4.

(Also The Next Doctor would have been an absolutely wild story for Rose and the Doctor to have gone on next. They arrive thinking they might have a fun Christmas and then they have to confront the fact that the Battle of Canary Wharf is still following them and how when they lost each other they lost everything. And how the villain in that is defeated by the Doctor showing her herself, which is what Davros tried to do the Doctor.)