I'm not saying good play won't win games. In general, I think all other things being equal play skill wins out. That said, I've experienced a number of games where play skill was mostly irrelevant. I played probably 20 games last night with a friend who I would consider as good or better. We essentially split games. That said, it was obvious a number of times where sheer luck had a far greater impact. Eg random discard of Han turn 1, a mostly flat board into an empy off the top (only drawing 2), turn 1 interrogation nabbing a resource generator, Motti off the top to negate a Jedi mind trick, 3 of 4 splash objectives getting flipped resource choking a deck, flipping into a key objective after losing one, etc. In my experience, the swinginess of the game can tend to trump gameplay. 

That said I've lost 3 games to making a single mistake and won at least 6 due to outplaying my opponent. 

I don't thing agnostic is underestimating the in game skill, but rather that there is definitely something to be said for deckbuilding and luck with a limited card pool that is further limited by pods and factions.