Exactly! It makes no logical sense, so they can't be in the same universe. Martha being on her honeymoon wouldn't have kept her from at least contacting the Doctor, and she would have have found a way to get in touch with Torchwood. Sarah Jane would have got Mr Smith and K-9 working on the problem...
Someone else said somewhere that global threats really don't work for Torchwood because of the Doctor and UNIT being the people who would automatically respond to anything on such a grand scale, and it's true. Torchwood worked while it was dealing with the flotsam and jetsam that fell through the Rift - they had a clear purpose, protecting the people of Cardiff and the surrounding areas from things and creatures that could harm them - but when you make the threat global and claim that only Torchwood can help and even they are incompetent, it all falls apart.
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Someone else said somewhere that global threats really don't work for Torchwood because of the Doctor and UNIT being the people who would automatically respond to anything on such a grand scale, and it's true. Torchwood worked while it was dealing with the flotsam and jetsam that fell through the Rift - they had a clear purpose, protecting the people of Cardiff and the surrounding areas from things and creatures that could harm them - but when you make the threat global and claim that only Torchwood can help and even they are incompetent, it all falls apart.