Yes, but I was looking for someone who maybe did a model on the quantitative effects of low gravity vs. low magnetosphere. There is no doubt that this effect exists (even my "opponent" conceded that), but I believe it's the dominant effect whereas some physicists apparently don't think so.
More specifically, all the material I can find seems to regard the lack of a magnetosphere as the dominant effect as well. Only this certain physicist suggested to me all this was a mere layman's explanation and that real astrophysicists "know" it's all about gravity instead. That kind of set off my bullshit alarm...