So Amy explains this and her absurdly unexplained actions about eleventy-million times, and everybody has a good cry and pats the old STARWHALE! on the belly for being such a good sport after three hundred years of abuse and all it can say is, "I'm simply pleased as punch simply just to be here! In fact, let me continue carrying your entire country on my back until you're done, because I don't mind the three hundred years of pointless torture. Thanks for explaining that obvious thing we all missed for a hundred generations, Amy Pond." It's all quite political.
The Doctor gives her a mile and a half of shit anyway, even though she saved him from a pointless moral struggle within himself that never really existed except for the five minutes necessary to make an amazing speech about how powerful and central and essential all of this is to the philosophy of realness and various other things we've already exhausted in the last five years of exploring his character, but in the end he relents because she tells him for the fiftieth time about how he's JUST LIKE STARWHALE! because he's old and lonely and loves crying Earthlings, and finally he gives in and he's like, "I really do."
At which point, if this were a story, we would think for one second about the opposite side of this analogy, which is that the first person he ever saw and imprinted on was Amelia Pond, the Girl Who Waited. She didn't cry, because she was awesome, but she did need him terribly bad. And he let her down. And maybe this applies, a little girl singing a song that's finally whole -- that like Amy, eventually we hope, is healed:
In bed above, we're deep asleep
While greater love lies further deep
This dream must end
This world must know
We all depend on the beast below
And if we hadn't suffered another thematic whiplash, if the SPACEWHALE! wasn't suddenly our Doctor, I would say that little bit brought a tear to my eye. We do depend. Our dreams depend. The World Must Know. It's all quite political, but if there's a point, that little song -- not the pointless Smilers or the slightly less-pointless Winders or the Sminders or the wasted wonder of Liz 10 or the beauty of the Starship UK, a nation that is also an idea that is also a beautiful living creature, all of whose parts depend now upon each other, knowingly, for survival, none high and none lower -- if there's a point, that little song is it. Don't forget where you came from.