I think it's a noteworthy comparison and not a non-sequitur/trueism. Can't say I've seen much evidence of thought yet.
Yes, if this article were rewritten word-for-word to reference prostitution it would be a fictional story which could be compared to the existing article. However, it would badly misrepresent the state of global sex trafficking and the victimhood of people affected by it.
The vast majority of human trafficking is to provide house servants and manufacturing workers, but we don't care because sex. Judging by this thread, stories of human trafficking that don't involve sex are heartwarming and inspirational.
The fact that this is clearly not true in this article may be another way in which it's heartwarming and inspirational, and not comparable to even the whitewashed version of human trafficking you're proposing.
Wow. Can't say that I thought of that.