Time travel is, to put it simply, lazy plotting and writing.
If anything in the hands of a creative person I'd say this is not at all true and requires a much more creative writer with understanding of plot and outcomes then a "straightforward story" (whatever that is...?) does.
And I personally don't see GEN as being a timetravel story - it would have been more interesting had it actually been that and less convoluted as well.
Sharr