Oxford University researchers say that only 8.2% of our DNA is likely to be functional. The rest is "junk."
However you define the term "theory," it's good pedagogy to approach controversial scientific claims like biological evolution in a skeptical, scientific spirit.
I am not sure why so many "science" bloggers and writers want to opine on ethics. Perhaps having to be objective and purely evidence based gets boring.
I discovered the assisted suicide death cult when my friend Frances killed herself under the influence of the Hemlock Society, since evolved into Compassion and Choices.