Many authors believe that. Many authors also write things that follow Sturgeon's Law: 90% of everything is crud.
In good writing - be it fantasy magic or science fiction superscience, you still have *rules*, even if they are implicit. The author sets expectations in the audience, and if you clumsily violate those expectations, you tend to create dissatisfaction in your audience. Sure, they could write a single line and wave it away, and then major science bloggers who normally laud the show will come down on it like they came down on, "Kill the Moon," for similar reasons: basic fixable laziness on the part of the writers and producers.
Correct me if I am wrong, but you seem to come from this from the assumption that if you find a way to give an audience an excuse to ignore something, then you're okay. I don't think the audience of Doctor Who is generally looking for reasons to ignore things. Many of them are looking for reasons to *think* about things. You won't satisfy them with poorly written one-liners.
No. That's why I recommend well-written lines instead. I certainly wouldn't be so silly as to advocate poorly written anything.