FaxModem1 wrote: ↑Fri Jun 01, 2018 9:20 pm
Whereas if the Sycorax just disappear, well, who knows how, when, or where they were killed. Earth gets more time to build up, research technology, and advance, and isn't dragged into whatever galactic wars happen. For instance the Time War, which destroyed entire civilizations. Or used for natural resources, like happened with the Slitheen. Or other such nasty things that happens to a non-developed nation by a developed one.
The thing is for all we and Jones know the Sycorax are intermittently or constantly updating their central hub (or distributed network) on their progress etc. Given the way we operate high technology it seems like we would set-up a feed to keep our central control aware of what happened to our ships, probes etc. (along with a black box flight recorder etc.). So that even if they were to meet with an accident or hostile destruction etc. we would have some clue what happened. So it seems like we should assume everyone now knows about the space laser and humanity's itchy trigger finger.
The writers may have intended we think of it the way you suggest, but the nature of plot holes etc. is that the writers intended you to think of them as not a problem but you can't help but think of them in some other way that undermines the story they are trying to tell.
Likewise the writers may have intended that the Torchwood space weapon be seen as a kind of space nuke (in CrypticMirror's parlance) or some sort of comprehensive defense, but it is really hard for me to see it as being an effective deterrent against invasion instead of a weapon of limited tactical and strategic value.
Of course part of what is at work here is the lack of agreement of how space to planet combat might be expected to actually work. For example in this episode which I have not seen, it seems to me the Sycorax are being needlessly circuitous in their threats to the Earth. Instead of messing about with blood control or whatever, just threaten to drop bigger and bigger rocks on the Earth until your demands are met that would seem to me easy for someone who had mastered interstellar travel and would achieve the same sort of threat to billions of peoples lives if not quite with the personal drama...
Anyway so as presented I find Harriet Jones decision tactically and strategically dubious and so that kind of confirms its moral dubiousness. Now if it were completely solid tactically and strategically I might be less willing to attack it morally, but for the reasons suggested above and given by others I do find it tactically and strategically dubious.