Not at all, we are being cautious. I was a member of IEEE for about 20 years, and particularly in the Plasma Sciences section. The papers are not necessarily peer-reviewed, and just because a paper is published in a peer-reviewed journal doesn't necessarily mean the particular paper received a rigorous review - based on personal experience with various journals.
That said - we're looking at Plasma Cosmology.
Cosmologists with a background in plasma physics are certainly qualified to talk about plasmas. Folks working on terrestrial plasmas who know nothing about astrophysics are not qualified to make definitive statements about the plasma behavior in space.
Plasma Cosmology is already described as non-standard
cosmology, which sets off alarm bells of skepticism for me.
Electric space: Evolution of the plasma universe
Plasma and the Universe: Large Scale Dynamics, Filamentation, and Radiation
are essentially the same material.