Fewer distractions?
I don't know but according to the article the amino acids were there but...well, here is from the article:
These amino acids “seeds” formed in interstellar space, possibly on asteroids as they careened through space. At the outset, they have equal amounts of left and right-handed amino acids. But as these rocks soar past neutron stars, their light rays trigger the selective destruction of one form of amino acid. The stars emit circularly polarized light—in one direction, its rays are polarized to the right. 180 degrees in the other direction, the star emits left-polarized light.
Panspermia is a recent scientific hypothesis, but not really new. The term has been around for thousands of years. The cometary hypothesis is not all that new an idea either, but even so, the comets and asteroids etc are all from the same region of the universe, that is, inside the solar system and would probably have some common characteristics with each other and earth whether they collide or not if the nebular hypothesis of planetary origin is at all valid.